NP-MRD: Showing NP-Card for 5-hydroxy-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-7-{[(2r,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}chromen-4-one (NP0143976)

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Record Information

Version

2.0

Created at

2022-09-01 22:50:46 UTC

Updated at

2022-09-01 22:50:46 UTC

NP-MRD ID

NP0143976

Secondary Accession Numbers

None

Natural Product Identification

Common Name

5-hydroxy-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-7-{[(2r,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}chromen-4-one

Description

Iristectorin B belongs to the class of organic compounds known as isoflavonoid o-glycosides. These are o-glycosylated derivatives of isoflavonoids, which are natural products derived from 3-phenylchromen-4-one. 5-hydroxy-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-7-{[(2r,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}chromen-4-one is found in Iris domestica. 5-hydroxy-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-7-{[(2r,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}chromen-4-one was first documented in 2005 (PMID: 15787436). Based on a literature review a significant number of articles have been published on Iristectorin B (PMID: 21552369) (PMID: 21355241) (PMID: 33001505) (PMID: 30196209) (PMID: 21715119) (PMID: 21444254).

Structure

MOL 3D MOL SDF PDB SMILES InChI


  Mrv1652309022200502D          

 35 38  0  0  1  0            999 V2000
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M  END

     RDKit          3D

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M  END


  Mrv1652309022200502D          

 35 38  0  0  1  0            999 V2000
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M  END
> <DATABASE_ID>
NP0143976

> <DATABASE_NAME>
NP-MRD

> <SMILES>
COC1=CC(=CC=C1O)C1=COC2=CC(O[C@H]3O[C@H](CO)[C@@H](O)[C@H](O)[C@H]3O)=C(OC)C(O)=C2C1=O

> <INCHI_IDENTIFIER>
InChI=1S/C23H24O12/c1-31-12-5-9(3-4-11(12)25)10-8-33-13-6-14(22(32-2)19(28)16(13)17(10)26)34-23-21(30)20(29)18(27)15(7-24)35-23/h3-6,8,15,18,20-21,23-25,27-30H,7H2,1-2H3/t15-,18-,20+,21-,23+/m1/s1

> <INCHI_KEY>
XVNKSNSGLVWSFS-IJLXDYNCSA-N

> <FORMULA>
C23H24O12

> <MOLECULAR_WEIGHT>
492.433

> <EXACT_MASS>
492.126776213

> <JCHEM_ACCEPTOR_COUNT>
12

> <JCHEM_ATOM_COUNT>
59

> <JCHEM_AVERAGE_POLARIZABILITY>
48.02344842274961

> <JCHEM_BIOAVAILABILITY>
0

> <JCHEM_DONOR_COUNT>
6

> <JCHEM_FORMAL_CHARGE>
0

> <JCHEM_GHOSE_FILTER>
0

> <JCHEM_IUPAC>
5-hydroxy-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-7-{[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}-4H-chromen-4-one

> <ALOGPS_LOGP>
0.68

> <JCHEM_LOGP>
0.4934617649999997

> <ALOGPS_LOGS>
-2.79

> <JCHEM_MDDR_LIKE_RULE>
1

> <JCHEM_NUMBER_OF_RINGS>
4

> <JCHEM_PHYSIOLOGICAL_CHARGE>
0

> <JCHEM_PKA>
9.455018549258435

> <JCHEM_PKA_STRONGEST_ACIDIC>
7.846048150842265

> <JCHEM_PKA_STRONGEST_BASIC>
-2.981092354981798

> <JCHEM_POLAR_SURFACE_AREA>
184.6

> <JCHEM_REFRACTIVITY>
116.75369999999998

> <JCHEM_ROTATABLE_BOND_COUNT>
6

> <JCHEM_RULE_OF_FIVE>
0

> <ALOGPS_SOLUBILITY>
7.90e-01 g/l

> <JCHEM_TRADITIONAL_IUPAC>
5-hydroxy-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-7-{[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}chromen-4-one

> <JCHEM_VEBER_RULE>
0

$$$$

HEADER    PROTEIN                                 02-SEP-22   NONE
TITLE     NULL                                                        
COMPND    NULL                                                        
SOURCE    NULL                                                        
KEYWDS    NULL                                                        
EXPDTA    NULL                                                        
AUTHOR    Marvin                                                      
REVDAT   1   02-SEP-22         0                                  
HETATM    1  C   UNK     0      -5.335  -3.080   0.000  0.00  0.00           C+0
HETATM    2  O   UNK     0      -4.001  -2.310   0.000  0.00  0.00           O+0
HETATM    3  C   UNK     0      -2.667  -3.080   0.000  0.00  0.00           C+0
HETATM    4  C   UNK     0      -1.334  -2.310   0.000  0.00  0.00           C+0
HETATM    5  C   UNK     0       0.000  -3.080   0.000  0.00  0.00           C+0
HETATM    6  C   UNK     0       1.334  -2.310   0.000  0.00  0.00           C+0
HETATM    7  C   UNK     0       1.334  -0.770   0.000  0.00  0.00           C+0
HETATM    8  O   UNK     0       2.667   0.000   0.000  0.00  0.00           O+0
HETATM    9  C   UNK     0       4.001  -0.770   0.000  0.00  0.00           C+0
HETATM   10  C   UNK     0       5.335   0.000   0.000  0.00  0.00           C+0
HETATM   11  C   UNK     0       6.668  -0.770   0.000  0.00  0.00           C+0
HETATM   12  O   UNK     0       8.002  -0.000   0.000  0.00  0.00           O+0
HETATM   13  C   UNK     0       9.336  -0.770   0.000  0.00  0.00           C+0
HETATM   14  O   UNK     0       9.336  -2.310   0.000  0.00  0.00           O+0
HETATM   15  C   UNK     0      10.669  -3.080   0.000  0.00  0.00           C+0
HETATM   16  C   UNK     0      10.669  -4.620   0.000  0.00  0.00           C+0
HETATM   17  O   UNK     0       9.336  -5.390   0.000  0.00  0.00           O+0
HETATM   18  C   UNK     0      12.003  -2.310   0.000  0.00  0.00           C+0
HETATM   19  O   UNK     0      13.337  -3.080   0.000  0.00  0.00           O+0
HETATM   20  C   UNK     0      12.003  -0.770   0.000  0.00  0.00           C+0
HETATM   21  O   UNK     0      13.337  -0.000   0.000  0.00  0.00           O+0
HETATM   22  C   UNK     0      10.669  -0.000   0.000  0.00  0.00           C+0
HETATM   23  O   UNK     0      10.669   1.540   0.000  0.00  0.00           O+0
HETATM   24  C   UNK     0       6.668  -2.310   0.000  0.00  0.00           C+0
HETATM   25  O   UNK     0       8.002  -3.080   0.000  0.00  0.00           O+0
HETATM   26  C   UNK     0       8.002  -4.620   0.000  0.00  0.00           C+0
HETATM   27  C   UNK     0       5.335  -3.080   0.000  0.00  0.00           C+0
HETATM   28  O   UNK     0       5.335  -4.620   0.000  0.00  0.00           O+0
HETATM   29  C   UNK     0       4.001  -2.310   0.000  0.00  0.00           C+0
HETATM   30  C   UNK     0       2.667  -3.080   0.000  0.00  0.00           C+0
HETATM   31  O   UNK     0       2.667  -4.620   0.000  0.00  0.00           O+0
HETATM   32  C   UNK     0       0.000  -4.620   0.000  0.00  0.00           C+0
HETATM   33  C   UNK     0      -1.334  -5.390   0.000  0.00  0.00           C+0
HETATM   34  C   UNK     0      -2.667  -4.620   0.000  0.00  0.00           C+0
HETATM   35  O   UNK     0      -4.001  -5.390   0.000  0.00  0.00           O+0
CONECT    1    2                                                            
CONECT    2    1    3                                                       
CONECT    3    2    4   34                                                  
CONECT    4    3    5                                                       
CONECT    5    4    6   32                                                  
CONECT    6    5    7   30                                                  
CONECT    7    6    8                                                       
CONECT    8    7    9                                                       
CONECT    9    8   10   29                                                  
CONECT   10    9   11                                                       
CONECT   11   10   12   24                                                  
CONECT   12   11   13                                                       
CONECT   13   12   14   22                                                  
CONECT   14   13   15                                                       
CONECT   15   14   16   18                                                  
CONECT   16   15   17                                                       
CONECT   17   16                                                            
CONECT   18   15   19   20                                                  
CONECT   19   18                                                            
CONECT   20   18   21   22                                                  
CONECT   21   20                                                            
CONECT   22   20   13   23                                                  
CONECT   23   22                                                            
CONECT   24   11   25   27                                                  
CONECT   25   24   26                                                       
CONECT   26   25                                                            
CONECT   27   24   28   29                                                  
CONECT   28   27                                                            
CONECT   29   27    9   30                                                  
CONECT   30   29    6   31                                                  
CONECT   31   30                                                            
CONECT   32    5   33                                                       
CONECT   33   32   34                                                       
CONECT   34   33    3   35                                                  
CONECT   35   34                                                            
MASTER        0    0    0    0    0    0    0    0   35    0   76    0
END

View in JSmol

Synonyms

Not Available

Chemical Formula

C₂₃H₂₄O₁₂

Average Mass

492.4330 Da

Monoisotopic Mass

492.12678 Da

IUPAC Name

5-hydroxy-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-7-{[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}-4H-chromen-4-one

Traditional Name

5-hydroxy-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-7-{[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}chromen-4-one

CAS Registry Number

Not Available

SMILES

COC1=CC(=CC=C1O)C1=COC2=CC(O[C@H]3O[C@H](CO)[C@@H](O)[C@H](O)[C@H]3O)=C(OC)C(O)=C2C1=O

InChI Identifier

InChI=1S/C23H24O12/c1-31-12-5-9(3-4-11(12)25)10-8-33-13-6-14(22(32-2)19(28)16(13)17(10)26)34-23-21(30)20(29)18(27)15(7-24)35-23/h3-6,8,15,18,20-21,23-25,27-30H,7H2,1-2H3/t15-,18-,20+,21-,23+/m1/s1

InChI Key

XVNKSNSGLVWSFS-IJLXDYNCSA-N

Experimental Spectra

Not Available

Predicted Spectra

Spectrum Type	Description	Depositor ID	Depositor Organization	Depositor	Deposition Date	View
1D NMR	¹³C NMR Spectrum (1D, 25 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 100 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹³C NMR Spectrum (1D, 252 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 1000 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹³C NMR Spectrum (1D, 50 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 200 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹³C NMR Spectrum (1D, 75 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 300 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹³C NMR Spectrum (1D, 101 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 400 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹³C NMR Spectrum (1D, 126 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 500 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹³C NMR Spectrum (1D, 151 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 600 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹³C NMR Spectrum (1D, 176 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 700 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹³C NMR Spectrum (1D, 201 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 800 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹³C NMR Spectrum (1D, 226 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 900 MHz, H₂O, predicted)	Wishart Lab	Wishart Lab	David Wishart	2021-06-20	View Spectrum

Chemical Shift Submissions

Not Available

Species

Species of Origin

Species Name	Source	Reference
Iris domestica	LOTUS Database	35616633

Chemical Taxonomy

Description

Belongs to the class of organic compounds known as isoflavonoid o-glycosides. These are o-glycosylated derivatives of isoflavonoids, which are natural products derived from 3-phenylchromen-4-one.

Kingdom

Organic compounds

Super Class

Phenylpropanoids and polyketides

Class

Isoflavonoids

Sub Class

Isoflavonoid O-glycosides

Direct Parent

Isoflavonoid O-glycosides

Alternative Parents

Substituents

Isoflavonoid-7-o-glycoside
Isoflavonoid o-glycoside
3p-methoxyisoflavone
Hydroxyisoflavonoid
Isoflavone
Phenolic glycoside
Hexose monosaccharide
O-glycosyl compound
Glycosyl compound
Chromone
1-benzopyran
Methoxyphenol
Benzopyran
Phenoxy compound
Methoxybenzene
Phenol ether
Anisole
1-hydroxy-4-unsubstituted benzenoid
1-hydroxy-2-unsubstituted benzenoid
Pyranone
Phenol
Alkyl aryl ether
Benzenoid
Pyran
Oxane
Monosaccharide
Monocyclic benzene moiety
Heteroaromatic compound
Vinylogous acid
Secondary alcohol
Oxacycle
Organoheterocyclic compound
Polyol
Ether
Acetal
Organic oxygen compound
Organic oxide
Hydrocarbon derivative
Primary alcohol
Organooxygen compound
Alcohol
Aromatic heteropolycyclic compound

Molecular Framework

Aromatic heteropolycyclic compounds

External Descriptors

Not Available

Physical Properties

State

Not Available

Experimental Properties

Property	Value	Reference
Melting Point	Not Available	Not Available
Boiling Point	Not Available	Not Available
Water Solubility	Not Available	Not Available
LogP	Not Available	Not Available

Predicted Properties

Property	Value	Source
logP	0.68	ALOGPS
logP	0.49	ChemAxon
logS	-2.8	ALOGPS
pKa (Strongest Acidic)	7.85	ChemAxon
pKa (Strongest Basic)	-3	ChemAxon
Physiological Charge	0	ChemAxon
Hydrogen Acceptor Count	12	ChemAxon
Hydrogen Donor Count	6	ChemAxon
Polar Surface Area	184.6 Å²	ChemAxon
Rotatable Bond Count	6	ChemAxon
Refractivity	116.75 m³·mol⁻¹	ChemAxon
Polarizability	48.02 Å³	ChemAxon
Number of Rings	4	ChemAxon
Bioavailability	No	ChemAxon
Rule of Five	No	ChemAxon
Ghose Filter	No	ChemAxon
Veber's Rule	No	ChemAxon
MDDR-like Rule	Yes	ChemAxon

External Links

HMDB ID

Not Available

DrugBank ID

Not Available

Phenol Explorer Compound ID

Not Available

FoodDB ID

Not Available

KNApSAcK ID

C00010132

Chemspider ID

78317647

KEGG Compound ID

Not Available

BioCyc ID

Not Available

BiGG ID

Not Available

Wikipedia Link

Not Available

METLIN ID

Not Available

PubChem Compound

138911431

PDB ID

Not Available

ChEBI ID

Not Available

Good Scents ID

Not Available

References

General References

Monthakantirat O, De-Eknamkul W, Umehara K, Yoshinaga Y, Miyase T, Warashina T, Noguchi H: Phenolic constituents of the rhizomes of the Thai medicinal plant Belamcanda chinensis with proliferative activity for two breast cancer cell lines. J Nat Prod. 2005 Mar;68(3):361-4. doi: 10.1021/np040175c. [PubMed:15787436 ]
Wang X, Liang Y, Peng C, Xie H, Pan M, Zhang T, Ito Y: PREPARATIVE ISOLATION AND PURIFICATION OF CHEMICAL CONSTITUENTS OF BELAMCANDA BY MPLC, HSCCC AND PREP-HPLC. J Liq Chromatogr Relat Technol. 2011;34(4):241-257. doi: 10.1080/10826076.2011.547058. [PubMed:21552369 ]
Huang L, Yang J, Peng Y, Xiao P: [Chemical constituents of Iris dichotoma]. Zhongguo Zhong Yao Za Zhi. 2010 Dec;35(23):3168-71. [PubMed:21355241 ]
Gao B, Ma Y, Zhang LT, Ren Q: Identification and characterization of the chemical components of Iris tectorum Maxim. and evaluation of their nitric oxide inhibitory activity. Rapid Commun Mass Spectrom. 2021 Jan 15;35(1):e8959. doi: 10.1002/rcm.8959. [PubMed:33001505 ]
Wen Y, He L, Peng R, Lin Y, Zhao L, Li X, Ye L, Yang J: A novel strategy to evaluate the quality of herbal products based on the chemical profiling, efficacy evaluation and pharmacokinetics. J Pharm Biomed Anal. 2018 Nov 30;161:326-335. doi: 10.1016/j.jpba.2018.08.047. Epub 2018 Aug 26. [PubMed:30196209 ]
Zhang YY, Wang Q, Qi LW, Qin XY, Qin MJ: Characterization and determination of the major constituents in Belamcandae Rhizoma by HPLC-DAD-ESI-MS(n). J Pharm Biomed Anal. 2011 Sep 10;56(2):304-14. doi: 10.1016/j.jpba.2011.05.040. Epub 2011 Jun 6. [PubMed:21715119 ]
Sun Y, Li W, Wang J: Ionic liquid based ultrasonic assisted extraction of isoflavones from Iris tectorum Maxim and subsequently separation and purification by high-speed counter-current chromatography. J Chromatogr B Analyt Technol Biomed Life Sci. 2011 Apr 15;879(13-14):975-80. doi: 10.1016/j.jchromb.2011.03.010. Epub 2011 Mar 12. [PubMed:21444254 ]
Sun Y, Liu Z, Wang J: Ultrasound-assisted extraction of five isoflavones from Iris tectorum Maxim. Sep Purif Technol. 2011 Mar 24;78(1):49-54. doi: 10.1016/j.seppur.2011.01.017. Epub 2011 Jan 25. [PubMed:32288612 ]
Qiu QH, Zhang ZG, Wang JH, Lv TS: [Studies on the isoflavonoids of Iris tectorum]. Zhong Yao Cai. 2009 Sep;32(9):1392-4. [PubMed:20034214 ]
LOTUS database [Link]

Showing NP-Card for 5-hydroxy-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-7-{[(2r,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}chromen-4-one (NP0143976)

MOL for NP0143976 (5-hydroxy-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-7-{[(2r,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}chromen-4-one)

3D MOL for NP0143976 (5-hydroxy-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-7-{[(2r,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}chromen-4-one)

3D SDF for NP0143976 (5-hydroxy-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-7-{[(2r,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}chromen-4-one)

3D-SDF for NP0143976 (5-hydroxy-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-7-{[(2r,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}chromen-4-one)

PDB for NP0143976 (5-hydroxy-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-7-{[(2r,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}chromen-4-one)

3D PDB for NP0143976 (5-hydroxy-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-7-{[(2r,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}chromen-4-one)

SMILES for NP0143976 (5-hydroxy-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-7-{[(2r,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}chromen-4-one)

INCHI for NP0143976 (5-hydroxy-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-7-{[(2r,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}chromen-4-one)

Structure for NP0143976 (5-hydroxy-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-7-{[(2r,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}chromen-4-one)

3D Structure for NP0143976 (5-hydroxy-3-(4-hydroxy-3-methoxyphenyl)-6-methoxy-7-{[(2r,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}chromen-4-one)