NP-MRD: Browsing natural products

NP-MRD ID
CAS Number Compound Name Species of Origin Chemical Structure Chemical Formula
Average Mass
Monoisotopic Mass NMR Spectra

NP0296765

2-{[2-hydroxy-19-(hydroxymethyl)-22-(2-hydroxypropan-2-yl)-3,8,8,17-tetramethyl-23,24-dioxaheptacyclo[19.2.1.0¹,¹⁸.0³,¹⁷.0⁴,¹⁴.0⁷,¹².0¹²,¹⁴]tetracosan-9-yl]oxy}oxane-3,4,5-triol

Actaea racemosa

C₃₅H₅₆O₁₀

636.8230 Da
636.38735 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296766

(1'r,2s,2'r,3'r,4'r,7'r,8's,9's,12'r,13's,14'r)-12',14'-bis(acetyloxy)-3',8',9'-trihydroxy-4',9',13'-trimethyl-5'-oxo-6'-oxaspiro[oxirane-2,17'-tricyclo[11.4.0.0³,⁷]heptadecan]-2'-yl acetate

Junceella fragilis

C₂₆H₃₈O₁₂

542.5780 Da
542.23633 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296767

2-methyl-5-(pentadec-8-en-1-yl)benzene-1,3-diol

Anacardium occidentale

C₂₂H₃₆O₂

332.5280 Da
332.27153 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296768

(2r,3r,4r,5s,6r)-2-{[(1r,4s,5s,8r,9r,12s,13s,16s)-8-[(2r,4e)-6-hydroxy-6-methylhept-4-en-2-yl]-5,9,17,17-tetramethyl-18-oxapentacyclo[10.5.2.0¹,¹³.0⁴,¹².0⁵,⁹]nonadec-2-en-16-yl]oxy}-6-(hydroxymethyl)oxane-3,4,5-triol

Momordica charantia

C₃₆H₅₈O₈

618.8520 Da
618.41317 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296769

(3z)-3-[(4-hydroxy-3-methoxyphenyl)methylidene]oxiran-2-ol

Nardostachys jatamansi

C₁₀H₁₀O₄

194.1860 Da
194.05791 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296770

methyl (2s,6r,11r,12s,14s,15r)-15-(furan-3-carbonyl)-14-hydroxy-2,7,7,12,15-pentamethyl-4,9,13-trioxo-3,8-dioxatetracyclo[10.5.0.0²,⁶.0⁶,¹¹]heptadecane-14-carboxylate

Harrisonia perforata

C₂₇H₃₂O₁₀

516.5430 Da
516.19955 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296771

(1r,2s,3s,5r,7s,10r,11s,12s,13r,14r,16s,17s,18s,19r)-4-ethyl-10-(hydroxymethyl)-12,16-dimethoxy-6-oxa-4-azaheptacyclo[15.2.1.0²,⁷.0²,¹¹.0³,¹³.0⁵,¹⁰.0¹⁴,¹⁹]icosane-13,14,18-triol

Consolida orientalis

C₂₃H₃₅NO₇

437.5330 Da
437.24135 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296772

(2r)-3-amino-2-hydroxy-n-{2-[(s)-methanesulfinyl]ethyl}propanimidic acid

Smilax china

C₆H₁₄N₂O₃S

194.2500 Da
194.07251 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296773

(3s,6s,9s,13s,17s)-5-hydroxy-9-isopropyl-3,6,7-trimethyl-13,17-diphenyl-1,10,14-trioxa-4,7-diazacycloheptadec-4-ene-2,8,11,15-tetrone

Pithomyces chartarum

C₃₀H₃₆N₂O₈

552.6240 Da
552.24717 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296774

(1r,1ar,7r,7as,7br)-1,4-bis(hydroxymethyl)-1,7-dimethyl-1ah,2h,5h,6h,7h,7ah,7bh-cyclopropa[e]azulen-3-one

Curvularia lunata

C₁₅H₂₂O₃

250.3380 Da
250.15689 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296775

6,23-dichloro-5,7,11,18,22,24-hexahydroxy-13,16-dimethyloctacyclo[13.11.1.1²,¹⁰.0³,⁸.0⁴,²⁵.0¹⁹,²⁷.0²¹,²⁶.0¹⁴,²⁸]octacosa-1,3,5,7,10(28),11,13,15(27),16,18,21(26),22,24-tridecaene-9,20-dione

Heterodermia obscurata

C₃₀H₁₄Cl₂O₈

573.3300 Da
572.00657 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296776

(1s,4as,6s,7as)-6-hydroxy-7-methylidene-1-{[(2s,3r,4s,5s,6r)-3,4,5-trihydroxy-6-({[(2e)-3-(4-hydroxy-3,5-dimethoxyphenyl)prop-2-enoyl]oxy}methyl)oxan-2-yl]oxy}-1h,4ah,5h,6h,7ah-cyclopenta[c]pyran-4-carboxylic acid

Gardenia jasminoides

C₂₇H₃₂O₁₄

580.5390 Da
580.17921 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296777

1,12-dihydroxy-2,11-dimethyl-7-methylidene-6-oxo-5,14-dioxatricyclo[9.2.1.0⁴,⁸]tetradec-2-en-9-yl 2-methylbutanoate

Not Available

C₂₀H₂₈O₇

380.4370 Da
380.18350 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296778

(2s,3s,4r,5r,6s)-6-{[5,7-dihydroxy-2-(4-hydroxy-3-methoxyphenyl)-4-oxochromen-3-yl]oxy}-4,5-dihydroxy-2-(hydroxymethyl)oxan-3-yl (2e)-3-(4-hydroxyphenyl)prop-2-enoate

Tribulus terrestris

C₃₁H₂₈O₁₄

624.5510 Da
624.14791 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296779

7-[(1e)-but-1-en-3-yn-1-yl]-2-(prop-2-en-1-yl)-1-azaspiro[5.5]undecan-8-ol

Dendrobates auratus

C₁₇H₂₅NO

259.3930 Da
259.19361 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296780

(1s,3as,3bs,9ar,9bs,11as)-1-[(2s)-2-hydroxy-6-methyl-5-methylideneheptan-2-yl]-9a,11a-dimethyl-1h,2h,3h,3ah,3bh,4h,5h,9bh,10h,11h-cyclopenta[a]phenanthren-7-one

Dendronephthya gigantea

C₂₈H₄₂O₂

410.6420 Da
410.31848 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296781

(1s,3e,6r,7e,9s,11e,14s,16r,17s,18r,19s)-6,21-dihydroxy-19-(1h-indol-3-ylmethyl)-7,9,16,17-tetramethyl-15-oxa-20-azatetracyclo[11.8.0.0¹,¹⁸.0¹⁴,¹⁶]henicosa-3,7,11,20-tetraene-2,5-dione

Calonectria kyotensis
Chaetomium subaffine
Penicillium aurantiogriseum

C₃₂H₃₆N₂O₅

528.6490 Da
528.26242 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296782

3-[6-(5-methoxy-5-oxopentan-2-yl)-3,7-dimethyl-9-oxo-13-(prop-1-en-2-yl)-15-oxatetracyclo[10.2.1.0²,¹⁰.0³,⁷]pentadec-2(10)-en-12-yl]propanoic acid

Not Available

C₂₈H₄₀O₆

472.6220 Da
472.28249 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296783

15-[1-(4,5-dimethyl-6-oxo-2,3-dihydropyran-2-yl)-1-hydroxyethyl]-10,15-dihydroxy-2,16-dimethyl-8-oxapentacyclo[9.7.0.0²,⁷.0⁷,⁹.0¹²,¹⁶]octadec-4-en-3-one

Withania somnifera

C₂₈H₃₈O₇

486.6050 Da
486.26175 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296784

(6s,6as,12ar)-6,11,12a-trihydroxy-2,3,9-trimethoxy-6,6a-dihydro-5,7-dioxatetraphen-12-one

Clitoria fairchildiana

C₁₉H₁₈O₉

390.3440 Da
390.09508 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296785

9a,11a-dimethyl-1-[1-(5-methyl-3,4,5,6-tetrahydropyridin-2-yl)ethyl]-1h,2h,3h,3ah,3bh,4h,6h,7h,8h,9h,9bh,10h,11h-cyclopenta[a]phenanthren-7-ol

Anticlea sibirica
Eclipta alba
Veratrum album
Veratrum dahuricum

C₂₇H₄₃NO

397.6470 Da
397.33447 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296786

1-acetyl-3a,7,11-trihydroxy-9a,11a-dimethyl-1h,2h,3h,3bh,4h,6h,7h,8h,9h,9bh,10h,11h-cyclopenta[a]phenanthren-10-yl acetate

Dregea volubilis

C₂₃H₃₄O₆

406.5190 Da
406.23554 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296787

10-(acetyloxy)-2,2,4a,6b,9,9,12a-heptamethyl-1,3,4,5,6,7,8,8a,10,11,12,12b,13,14b-tetradecahydropicene-6a-carboxylic acid

Astilbe rubra
Calendula officinalis

C₃₂H₅₀O₄

498.7480 Da
498.37091 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296788

3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl 10,11-dihydroxy-9-(hydroxymethyl)-1,2,6a,6b,9,12a-hexamethyl-3,4,5,6,7,8,8a,10,11,12,12b,13-dodecahydro-2h-picene-4a-carboxylate

Rubus ellipticus
Rubus pinfaensis

C₃₆H₅₆O₁₀

648.8340 Da
648.38735 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

NP0296789

11'-methyl-3',5'-dioxa-11'-azaspiro[cyclohexane-1,14'-tetracyclo[6.6.1.0²,⁶.0¹²,¹⁵]pentadecane]-1'(15'),2,2'(6'),5,7'-pentaen-4-one

Papaver armeniacum
Papaver dubium
Roemeria hybrida
Roemeria refracta

C₁₈H₁₇NO₃

295.3380 Da
295.12084 Da

¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)
¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)
¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)

Browsing natural products

Filter by kingdom:

Filter by solvent:

Filter by spectral type:

Filter by nucleus:

Filter by spectra quality:

Filter by assignment quality: