NP-MRD: Showing NP-Card for 3-(acetyloxy)-6a,7-dihydroxy-4,4,8,11b-tetramethyl-9-oxo-1h,2h,3h,4ah,5h,6h,7h,10ah,11h,11ah-phenanthro[3,2-b]furan-1-yl acetate (NP0252393)

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Record Information

Version

2.0

Created at

2022-09-07 15:53:32 UTC

Updated at

2022-09-07 15:53:32 UTC

NP-MRD ID

NP0252393

Secondary Accession Numbers

None

Natural Product Identification

Common Name

3-(acetyloxy)-6a,7-dihydroxy-4,4,8,11b-tetramethyl-9-oxo-1h,2h,3h,4ah,5h,6h,7h,10ah,11h,11ah-phenanthro[3,2-b]furan-1-yl acetate

Description

5-(Acetyloxy)-10,11-dihydroxy-2,6,6,13-tetramethyl-14-oxo-15-oxatetracyclo[8.7.0.0²,⁷.0¹²,¹⁶]Heptadec-12-en-3-yl acetate belongs to the class of organic compounds known as diterpene lactones. These are diterpenoids containing a lactone moiety. 3-(acetyloxy)-6a,7-dihydroxy-4,4,8,11b-tetramethyl-9-oxo-1h,2h,3h,4ah,5h,6h,7h,10ah,11h,11ah-phenanthro[3,2-b]furan-1-yl acetate is found in Suregada aequorea. 5-(Acetyloxy)-10,11-dihydroxy-2,6,6,13-tetramethyl-14-oxo-15-oxatetracyclo[8.7.0.0²,⁷.0¹²,¹⁶]Heptadec-12-en-3-yl acetate is an extremely weak basic (essentially neutral) compound (based on its pKa).

Structure

MOL 3D MOL SDF PDB SMILES InChI


  Mrv1533004241513132D          

 32 35  0  0  0  0            999 V2000
    1.4852   -2.5221    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.9533   -1.8914    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.1412   -2.0366    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.2336   -1.1154    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.0458   -0.9702    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.5776   -1.6009    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.3897   -1.4557    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.9215   -2.0864    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.6412   -2.8623    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.1730   -3.4930    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.8291   -3.0076    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.6700   -0.6798    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.2018   -1.3105    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.1382   -0.0491    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.4185    0.7268    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.2306    0.8721    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.7624    0.2414    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.0427    1.0173    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    5.5745    0.3866    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.8548    1.1625    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    6.1064   -0.2441    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.9309   -0.2709    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    7.4373    0.3804    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    7.1602   -1.0634    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    7.9362   -1.3437    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    6.4774   -1.5264    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    5.8261   -1.0201    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.0139   -1.1653    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.4821   -0.5346    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
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    2.1526    0.6123    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.5604    0.1129    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  2  0  0  0  0
  2  4  1  0  0  0  0
  4  5  1  0  0  0  0
  5  6  1  0  0  0  0
  6  7  1  0  0  0  0
  7  8  1  0  0  0  0
  8  9  1  0  0  0  0
  9 10  2  0  0  0  0
  9 11  1  0  0  0  0
  7 12  1  0  0  0  0
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 12 14  1  0  0  0  0
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 15 16  1  0  0  0  0
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 17 29  1  0  0  0  0
 14 30  1  0  0  0  0
  5 30  1  0  0  0  0
 30 31  1  0  0  0  0
 30 32  1  0  0  0  0
M  END

     RDKit          3D

 66 69  0  0  0  0  0  0  0  0999 V2000
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M  END


  Mrv1533004241513132D          

 32 35  0  0  0  0            999 V2000
    1.4852   -2.5221    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.9533   -1.8914    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
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M  END
> <DATABASE_ID>
NP0252393

> <DATABASE_NAME>
NP-MRD

> <SMILES>
CC(=O)OC1CC(OC(C)=O)C2(C)C(CCC3(O)C(O)C4=C(C)C(=O)OC4CC23)C1(C)C

> <INCHI_IDENTIFIER>
InChI=1S/C24H34O8/c1-11-19-14(32-21(11)28)9-16-23(6)15(7-8-24(16,29)20(19)27)22(4,5)17(30-12(2)25)10-18(23)31-13(3)26/h14-18,20,27,29H,7-10H2,1-6H3

> <INCHI_KEY>
YGBRRZUVVJINOK-UHFFFAOYSA-N

> <FORMULA>
C24H34O8

> <MOLECULAR_WEIGHT>
450.528

> <EXACT_MASS>
450.225368055

> <JCHEM_ACCEPTOR_COUNT>
5

> <JCHEM_ATOM_COUNT>
66

> <JCHEM_AVERAGE_POLARIZABILITY>
47.53327837797457

> <JCHEM_BIOAVAILABILITY>
1

> <JCHEM_DONOR_COUNT>
2

> <JCHEM_FORMAL_CHARGE>
0

> <JCHEM_GHOSE_FILTER>
1

> <JCHEM_IUPAC>
5-(acetyloxy)-10,11-dihydroxy-2,6,6,13-tetramethyl-14-oxo-15-oxatetracyclo[8.7.0.0²,⁷.0¹²,¹⁶]heptadec-12-en-3-yl acetate

> <ALOGPS_LOGP>
1.60

> <JCHEM_LOGP>
1.1730651466666668

> <ALOGPS_LOGS>
-3.25

> <JCHEM_MDDR_LIKE_RULE>
0

> <JCHEM_NUMBER_OF_RINGS>
4

> <JCHEM_PHYSIOLOGICAL_CHARGE>
0

> <JCHEM_PKA>
13.475917745780976

> <JCHEM_PKA_STRONGEST_ACIDIC>
12.072487751055567

> <JCHEM_PKA_STRONGEST_BASIC>
-3.441476473422349

> <JCHEM_POLAR_SURFACE_AREA>
119.36

> <JCHEM_REFRACTIVITY>
112.22389999999999

> <JCHEM_ROTATABLE_BOND_COUNT>
4

> <JCHEM_RULE_OF_FIVE>
1

> <ALOGPS_SOLUBILITY>
2.52e-01 g/l

> <JCHEM_TRADITIONAL_IUPAC>
5-(acetyloxy)-10,11-dihydroxy-2,6,6,13-tetramethyl-14-oxo-15-oxatetracyclo[8.7.0.0²,⁷.0¹²,¹⁶]heptadec-12-en-3-yl acetate

> <JCHEM_VEBER_RULE>
0

$$$$

HEADER    PROTEIN                                 24-APR-15   NONE
TITLE     NULL                                                        
COMPND    NULL                                                        
SOURCE    NULL                                                        
KEYWDS    NULL                                                        
EXPDTA    NULL                                                        
AUTHOR    Marvin                                                      
REVDAT   1   24-APR-15         0                                  
HETATM    1  C   UNK     0       2.772  -4.708   0.000  0.00  0.00           C+0
HETATM    2  C   UNK     0       1.780  -3.531   0.000  0.00  0.00           C+0
HETATM    3  O   UNK     0       0.264  -3.802   0.000  0.00  0.00           O+0
HETATM    4  O   UNK     0       2.303  -2.082   0.000  0.00  0.00           O+0
HETATM    5  C   UNK     0       3.819  -1.811   0.000  0.00  0.00           C+0
HETATM    6  C   UNK     0       4.811  -2.988   0.000  0.00  0.00           C+0
HETATM    7  C   UNK     0       6.327  -2.717   0.000  0.00  0.00           C+0
HETATM    8  O   UNK     0       7.320  -3.895   0.000  0.00  0.00           O+0
HETATM    9  C   UNK     0       6.797  -5.343   0.000  0.00  0.00           C+0
HETATM   10  O   UNK     0       7.790  -6.520   0.000  0.00  0.00           O+0
HETATM   11  C   UNK     0       5.281  -5.614   0.000  0.00  0.00           C+0
HETATM   12  C   UNK     0       6.851  -1.269   0.000  0.00  0.00           C+0
HETATM   13  C   UNK     0       7.843  -2.446   0.000  0.00  0.00           C+0
HETATM   14  C   UNK     0       5.858  -0.092   0.000  0.00  0.00           C+0
HETATM   15  C   UNK     0       6.381   1.357   0.000  0.00  0.00           C+0
HETATM   16  C   UNK     0       7.897   1.628   0.000  0.00  0.00           C+0
HETATM   17  C   UNK     0       8.890   0.451   0.000  0.00  0.00           C+0
HETATM   18  O   UNK     0       9.413   1.899   0.000  0.00  0.00           O+0
HETATM   19  C   UNK     0      10.406   0.722   0.000  0.00  0.00           C+0
HETATM   20  O   UNK     0      10.929   2.170   0.000  0.00  0.00           O+0
HETATM   21  C   UNK     0      11.399  -0.456   0.000  0.00  0.00           C+0
HETATM   22  C   UNK     0      12.938  -0.506   0.000  0.00  0.00           C+0
HETATM   23  C   UNK     0      13.883   0.710   0.000  0.00  0.00           C+0
HETATM   24  C   UNK     0      13.366  -1.985   0.000  0.00  0.00           C+0
HETATM   25  O   UNK     0      14.814  -2.508   0.000  0.00  0.00           O+0
HETATM   26  O   UNK     0      12.091  -2.849   0.000  0.00  0.00           O+0
HETATM   27  C   UNK     0      10.875  -1.904   0.000  0.00  0.00           C+0
HETATM   28  C   UNK     0       9.359  -2.175   0.000  0.00  0.00           C+0
HETATM   29  C   UNK     0       8.367  -0.998   0.000  0.00  0.00           C+0
HETATM   30  C   UNK     0       4.342  -0.363   0.000  0.00  0.00           C+0
HETATM   31  C   UNK     0       4.018   1.143   0.000  0.00  0.00           C+0
HETATM   32  C   UNK     0       2.913   0.211   0.000  0.00  0.00           C+0
CONECT    1    2                                                            
CONECT    2    1    3    4                                                  
CONECT    3    2                                                            
CONECT    4    2    5                                                       
CONECT    5    4    6   30                                                  
CONECT    6    5    7                                                       
CONECT    7    6    8   12                                                  
CONECT    8    7    9                                                       
CONECT    9    8   10   11                                                  
CONECT   10    9                                                            
CONECT   11    9                                                            
CONECT   12    7   13   14   29                                             
CONECT   13   12                                                            
CONECT   14   12   15   30                                                  
CONECT   15   14   16                                                       
CONECT   16   15   17                                                       
CONECT   17   16   18   19   29                                             
CONECT   18   17                                                            
CONECT   19   17   20   21                                                  
CONECT   20   19                                                            
CONECT   21   19   22   27                                                  
CONECT   22   21   23   24                                                  
CONECT   23   22                                                            
CONECT   24   22   25   26                                                  
CONECT   25   24                                                            
CONECT   26   24   27                                                       
CONECT   27   26   21   28                                                  
CONECT   28   27   29                                                       
CONECT   29   28   12   17                                                  
CONECT   30   14    5   31   32                                             
CONECT   31   30                                                            
CONECT   32   30                                                            
MASTER        0    0    0    0    0    0    0    0   32    0   70    0
END

View in JSmol

Synonyms

Value	Source
5-(Acetyloxy)-10,11-dihydroxy-2,6,6,13-tetramethyl-14-oxo-15-oxatetracyclo[8.7.0.0,.0,]heptadec-12-en-3-yl acetic acid	Generator
5-(Acetyloxy)-10,11-dihydroxy-2,6,6,13-tetramethyl-14-oxo-15-oxatetracyclo[8.7.0.0²,⁷.0¹²,¹⁶]heptadec-12-en-3-yl acetic acid	Generator

Chemical Formula

C₂₄H₃₄O₈

Average Mass

450.5280 Da

Monoisotopic Mass

450.22537 Da

IUPAC Name

5-(acetyloxy)-10,11-dihydroxy-2,6,6,13-tetramethyl-14-oxo-15-oxatetracyclo[8.7.0.0²,⁷.0¹²,¹⁶]heptadec-12-en-3-yl acetate

Traditional Name

5-(acetyloxy)-10,11-dihydroxy-2,6,6,13-tetramethyl-14-oxo-15-oxatetracyclo[8.7.0.0²,⁷.0¹²,¹⁶]heptadec-12-en-3-yl acetate

CAS Registry Number

Not Available

SMILES

CC(=O)OC1CC(OC(C)=O)C2(C)C(CCC3(O)C(O)C4=C(C)C(=O)OC4CC23)C1(C)C

InChI Identifier

InChI=1S/C24H34O8/c1-11-19-14(32-21(11)28)9-16-23(6)15(7-8-24(16,29)20(19)27)22(4,5)17(30-12(2)25)10-18(23)31-13(3)26/h14-18,20,27,29H,7-10H2,1-6H3

InChI Key

YGBRRZUVVJINOK-UHFFFAOYSA-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
Suregada aequorea	LOTUS Database	35616633

Chemical Taxonomy

Description

Belongs to the class of organic compounds known as diterpene lactones. These are diterpenoids containing a lactone moiety.

Kingdom

Organic compounds

Super Class

Lipids and lipid-like molecules

Class

Prenol lipids

Sub Class

Terpene lactones

Direct Parent

Diterpene lactones

Alternative Parents

Substituents

Diterpene lactone
Abietane diterpenoid
Diterpenoid
Naphthofuran
Tricarboxylic acid or derivatives
2-furanone
Cyclic alcohol
Dihydrofuran
Alpha,beta-unsaturated carboxylic ester
Enoate ester
Tertiary alcohol
1,2-diol
Carboxylic acid ester
Secondary alcohol
Lactone
Oxacycle
Carboxylic acid derivative
Organoheterocyclic compound
Hydrocarbon derivative
Organic oxide
Alcohol
Carbonyl group
Organic oxygen compound
Organooxygen compound
Aliphatic heteropolycyclic compound

Molecular Framework

Aliphatic 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	1.6	ALOGPS
logP	1.17	ChemAxon
logS	-3.2	ALOGPS
pKa (Strongest Acidic)	12.07	ChemAxon
pKa (Strongest Basic)	-3.4	ChemAxon
Physiological Charge	0	ChemAxon
Hydrogen Acceptor Count	5	ChemAxon
Hydrogen Donor Count	2	ChemAxon
Polar Surface Area	119.36 Å²	ChemAxon
Rotatable Bond Count	4	ChemAxon
Refractivity	112.22 m³·mol⁻¹	ChemAxon
Polarizability	47.53 Å³	ChemAxon
Number of Rings	4	ChemAxon
Bioavailability	Yes	ChemAxon
Rule of Five	Yes	ChemAxon
Ghose Filter	Yes	ChemAxon
Veber's Rule	No	ChemAxon
MDDR-like Rule	No	ChemAxon

External Links

HMDB ID

Not Available

DrugBank ID

Not Available

Phenol Explorer Compound ID

Not Available

FoodDB ID

Not Available

KNApSAcK ID

Not Available

Chemspider ID

Not Available

KEGG Compound ID

Not Available

BioCyc ID

Not Available

BiGG ID

Not Available

Wikipedia Link

Not Available

METLIN ID

Not Available

PubChem Compound

Not Available

PDB ID

Not Available

ChEBI ID

Not Available

Good Scents ID

Not Available

References

General References

LOTUS database [Link]

Showing NP-Card for 3-(acetyloxy)-6a,7-dihydroxy-4,4,8,11b-tetramethyl-9-oxo-1h,2h,3h,4ah,5h,6h,7h,10ah,11h,11ah-phenanthro[3,2-b]furan-1-yl acetate (NP0252393)

MOL for NP0252393 (3-(acetyloxy)-6a,7-dihydroxy-4,4,8,11b-tetramethyl-9-oxo-1h,2h,3h,4ah,5h,6h,7h,10ah,11h,11ah-phenanthro[3,2-b]furan-1-yl acetate)

3D MOL for NP0252393 (3-(acetyloxy)-6a,7-dihydroxy-4,4,8,11b-tetramethyl-9-oxo-1h,2h,3h,4ah,5h,6h,7h,10ah,11h,11ah-phenanthro[3,2-b]furan-1-yl acetate)

3D SDF for NP0252393 (3-(acetyloxy)-6a,7-dihydroxy-4,4,8,11b-tetramethyl-9-oxo-1h,2h,3h,4ah,5h,6h,7h,10ah,11h,11ah-phenanthro[3,2-b]furan-1-yl acetate)

3D-SDF for NP0252393 (3-(acetyloxy)-6a,7-dihydroxy-4,4,8,11b-tetramethyl-9-oxo-1h,2h,3h,4ah,5h,6h,7h,10ah,11h,11ah-phenanthro[3,2-b]furan-1-yl acetate)

PDB for NP0252393 (3-(acetyloxy)-6a,7-dihydroxy-4,4,8,11b-tetramethyl-9-oxo-1h,2h,3h,4ah,5h,6h,7h,10ah,11h,11ah-phenanthro[3,2-b]furan-1-yl acetate)

3D PDB for NP0252393 (3-(acetyloxy)-6a,7-dihydroxy-4,4,8,11b-tetramethyl-9-oxo-1h,2h,3h,4ah,5h,6h,7h,10ah,11h,11ah-phenanthro[3,2-b]furan-1-yl acetate)

SMILES for NP0252393 (3-(acetyloxy)-6a,7-dihydroxy-4,4,8,11b-tetramethyl-9-oxo-1h,2h,3h,4ah,5h,6h,7h,10ah,11h,11ah-phenanthro[3,2-b]furan-1-yl acetate)

INCHI for NP0252393 (3-(acetyloxy)-6a,7-dihydroxy-4,4,8,11b-tetramethyl-9-oxo-1h,2h,3h,4ah,5h,6h,7h,10ah,11h,11ah-phenanthro[3,2-b]furan-1-yl acetate)

Structure for NP0252393 (3-(acetyloxy)-6a,7-dihydroxy-4,4,8,11b-tetramethyl-9-oxo-1h,2h,3h,4ah,5h,6h,7h,10ah,11h,11ah-phenanthro[3,2-b]furan-1-yl acetate)

3D Structure for NP0252393 (3-(acetyloxy)-6a,7-dihydroxy-4,4,8,11b-tetramethyl-9-oxo-1h,2h,3h,4ah,5h,6h,7h,10ah,11h,11ah-phenanthro[3,2-b]furan-1-yl acetate)