NP-MRD: Showing NP-Card for (4ar,6ar,6br,8r,8ar,10s,12ar,12br,14br)-8,10-dihydroxy-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 (NP0331056)

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Record Information

Version

1.0

Created at

2022-09-12 17:01:13 UTC

Updated at

2022-09-12 17:01:14 UTC

NP-MRD ID

NP0331056

Secondary Accession Numbers

None

Natural Product Identification

Common Name

(4ar,6ar,6br,8r,8ar,10s,12ar,12br,14br)-8,10-dihydroxy-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

Description

Astilbic acid, also known as astilbate, belongs to the class of organic compounds known as triterpenoids. These are terpene molecules containing six isoprene units. (4ar,6ar,6br,8r,8ar,10s,12ar,12br,14br)-8,10-dihydroxy-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 is found in Astilbe chinensis, Astilbe grandis and Astilbe rubra. It was first documented in 2004 (PMID: 15301745). Based on a literature review a small amount of articles have been published on Astilbic acid (PMID: 21168540) (PMID: 16580200) (PMID: 15635157).

Structure

MOL 3D MOL SDF PDB SMILES InChI


  Mrv1652309122219012D          

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M  END

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M  END


  Mrv1652309122219012D          

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    4.8395   -5.9664    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    5.2520   -6.6809    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    4.0145   -5.9664    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.6020   -5.2520    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    3.6882   -6.0725    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.5395   -4.5375    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    1.1270   -3.8230    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  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  6  0  0  0
  6  8  1  0  0  0  0
  8  9  1  0  0  0  0
  9 10  1  0  0  0  0
 10 11  1  1  0  0  0
 11 12  2  0  0  0  0
 11 13  1  0  0  0  0
 10 14  1  0  0  0  0
 14 15  2  0  0  0  0
 15 16  1  0  0  0  0
 17 16  1  6  0  0  0
 17 18  1  0  0  0  0
 18 19  1  6  0  0  0
 18 20  1  0  0  0  0
 20 21  1  0  0  0  0
 21 22  1  0  0  0  0
 22 23  1  6  0  0  0
 22 24  1  0  0  0  0
 24 25  1  0  0  0  0
 24 26  1  0  0  0  0
 27 24  1  6  0  0  0
 18 27  1  0  0  0  0
 27 28  1  0  0  0  0
 28 29  1  6  0  0  0
 28 30  1  0  0  0  0
 30 31  1  0  0  0  0
 17 31  1  0  0  0  0
 10 31  1  0  0  0  0
 31 32  1  6  0  0  0
 33 14  1  1  0  0  0
  6 33  1  0  0  0  0
 33 34  1  0  0  0  0
  2 34  1  0  0  0  0
M  END
> <DATABASE_ID>
NP0331056

> <DATABASE_NAME>
NP-MRD

> <SMILES>
CC1(C)CC[C@]2(C)CC[C@]3(C(O)=O)C(=CC[C@@H]4[C@@]5(C)CC[C@H](O)C(C)(C)[C@@H]5[C@H](O)C[C@@]34C)[C@@H]2C1

> <INCHI_IDENTIFIER>
InChI=1S/C30H48O4/c1-25(2)12-13-27(5)14-15-30(24(33)34)18(19(27)16-25)8-9-21-28(6)11-10-22(32)26(3,4)23(28)20(31)17-29(21,30)7/h8,19-23,31-32H,9-17H2,1-7H3,(H,33,34)/t19-,20+,21+,22-,23-,27+,28+,29+,30+/m0/s1

> <INCHI_KEY>
LUJTWDWEYNWTBP-USPQCQLHSA-N

> <FORMULA>
C30H48O4

> <MOLECULAR_WEIGHT>
472.71

> <EXACT_MASS>
472.355260026

> <JCHEM_ACCEPTOR_COUNT>
4

> <JCHEM_ATOM_COUNT>
82

> <JCHEM_AVERAGE_POLARIZABILITY>
55.34068775237106

> <JCHEM_BIOAVAILABILITY>
1

> <JCHEM_DONOR_COUNT>
3

> <JCHEM_FORMAL_CHARGE>
0

> <JCHEM_GHOSE_FILTER>
0

> <JCHEM_IUPAC>
(4aR,6aR,6bR,8R,8aR,10S,12aR,12bR,14bR)-8,10-dihydroxy-2,2,4a,6b,9,9,12a-heptamethyl-1,2,3,4,4a,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14b-icosahydropicene-6a-carboxylic acid

> <JCHEM_LOGP>
5.2860686363333365

> <JCHEM_MDDR_LIKE_RULE>
0

> <JCHEM_NUMBER_OF_RINGS>
5

> <JCHEM_PHYSIOLOGICAL_CHARGE>
-1

> <JCHEM_PKA>
14.48849781879819

> <JCHEM_PKA_STRONGEST_ACIDIC>
4.707589299077827

> <JCHEM_PKA_STRONGEST_BASIC>
-2.8460765457769917

> <JCHEM_POLAR_SURFACE_AREA>
77.76

> <JCHEM_REFRACTIVITY>
135.21699999999998

> <JCHEM_ROTATABLE_BOND_COUNT>
1

> <JCHEM_RULE_OF_FIVE>
0

> <JCHEM_TRADITIONAL_IUPAC>
(4aR,6aR,6bR,8R,8aR,10S,12aR,12bR,14bR)-8,10-dihydroxy-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

> <JCHEM_VEBER_RULE>
0

$$$$

HEADER    PROTEIN                                 12-SEP-22   NONE
TITLE     NULL                                                        
COMPND    NULL                                                        
SOURCE    NULL                                                        
KEYWDS    NULL                                                        
EXPDTA    NULL                                                        
AUTHOR    Marvin                                                      
REVDAT   1   12-SEP-22         0                                  
HETATM    1  C   UNK     0      -0.883  -6.610   0.000  0.00  0.00           C+0
HETATM    2  C   UNK     0       0.564  -7.136   0.000  0.00  0.00           C+0
HETATM    3  C   UNK     0       0.831  -5.620   0.000  0.00  0.00           C+0
HETATM    4  C   UNK     0      -0.206  -8.470   0.000  0.00  0.00           C+0
HETATM    5  C   UNK     0       0.564  -9.804   0.000  0.00  0.00           C+0
HETATM    6  C   UNK     0       2.104  -9.804   0.000  0.00  0.00           C+0
HETATM    7  C   UNK     0       1.334 -11.137   0.000  0.00  0.00           C+0
HETATM    8  C   UNK     0       2.874 -11.137   0.000  0.00  0.00           C+0
HETATM    9  C   UNK     0       4.414 -11.137   0.000  0.00  0.00           C+0
HETATM   10  C   UNK     0       5.184  -9.804   0.000  0.00  0.00           C+0
HETATM   11  C   UNK     0       5.954 -11.137   0.000  0.00  0.00           C+0
HETATM   12  O   UNK     0       7.200 -12.043   0.000  0.00  0.00           O+0
HETATM   13  O   UNK     0       5.184 -12.471   0.000  0.00  0.00           O+0
HETATM   14  C   UNK     0       4.414  -8.470   0.000  0.00  0.00           C+0
HETATM   15  C   UNK     0       5.184  -7.136   0.000  0.00  0.00           C+0
HETATM   16  C   UNK     0       6.724  -7.136   0.000  0.00  0.00           C+0
HETATM   17  C   UNK     0       7.494  -8.470   0.000  0.00  0.00           C+0
HETATM   18  C   UNK     0       9.034  -8.470   0.000  0.00  0.00           C+0
HETATM   19  C   UNK     0       8.264  -7.136   0.000  0.00  0.00           C+0
HETATM   20  C   UNK     0       9.804  -7.136   0.000  0.00  0.00           C+0
HETATM   21  C   UNK     0      11.344  -7.136   0.000  0.00  0.00           C+0
HETATM   22  C   UNK     0      12.114  -8.470   0.000  0.00  0.00           C+0
HETATM   23  O   UNK     0      13.654  -8.470   0.000  0.00  0.00           O+0
HETATM   24  C   UNK     0      11.344  -9.804   0.000  0.00  0.00           C+0
HETATM   25  C   UNK     0      12.791 -10.330   0.000  0.00  0.00           C+0
HETATM   26  C   UNK     0      11.076 -11.320   0.000  0.00  0.00           C+0
HETATM   27  C   UNK     0       9.804  -9.804   0.000  0.00  0.00           C+0
HETATM   28  C   UNK     0       9.034 -11.137   0.000  0.00  0.00           C+0
HETATM   29  O   UNK     0       9.804 -12.471   0.000  0.00  0.00           O+0
HETATM   30  C   UNK     0       7.494 -11.137   0.000  0.00  0.00           C+0
HETATM   31  C   UNK     0       6.724  -9.804   0.000  0.00  0.00           C+0
HETATM   32  C   UNK     0       6.885 -11.335   0.000  0.00  0.00           C+0
HETATM   33  C   UNK     0       2.874  -8.470   0.000  0.00  0.00           C+0
HETATM   34  C   UNK     0       2.104  -7.136   0.000  0.00  0.00           C+0
CONECT    1    2                                                            
CONECT    2    1    3    4   34                                             
CONECT    3    2                                                            
CONECT    4    2    5                                                       
CONECT    5    4    6                                                       
CONECT    6    5    7    8   33                                             
CONECT    7    6                                                            
CONECT    8    6    9                                                       
CONECT    9    8   10                                                       
CONECT   10    9   11   14   31                                             
CONECT   11   10   12   13                                                  
CONECT   12   11                                                            
CONECT   13   11                                                            
CONECT   14   10   15   33                                                  
CONECT   15   14   16                                                       
CONECT   16   15   17                                                       
CONECT   17   16   18   31                                                  
CONECT   18   17   19   20   27                                             
CONECT   19   18                                                            
CONECT   20   18   21                                                       
CONECT   21   20   22                                                       
CONECT   22   21   23   24                                                  
CONECT   23   22                                                            
CONECT   24   22   25   26   27                                             
CONECT   25   24                                                            
CONECT   26   24                                                            
CONECT   27   24   18   28                                                  
CONECT   28   27   29   30                                                  
CONECT   29   28                                                            
CONECT   30   28   31                                                       
CONECT   31   30   17   10   32                                             
CONECT   32   31                                                            
CONECT   33   14    6   34                                                  
CONECT   34   33    2                                                       
MASTER        0    0    0    0    0    0    0    0   34    0   76    0
END

View in JSmol

Synonyms

Value	Source
Astilbate	Generator
3beta,6beta-Dihydroxyolean-12-en-27-Oic acid	MeSH

Chemical Formula

C₃₀H₄₈O₄

Average Mass

472.7100 Da

Monoisotopic Mass

472.35526 Da

IUPAC Name

(4aR,6aR,6bR,8R,8aR,10S,12aR,12bR,14bR)-8,10-dihydroxy-2,2,4a,6b,9,9,12a-heptamethyl-1,2,3,4,4a,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14b-icosahydropicene-6a-carboxylic acid

Traditional Name

(4aR,6aR,6bR,8R,8aR,10S,12aR,12bR,14bR)-8,10-dihydroxy-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

CAS Registry Number

Not Available

SMILES

CC1(C)CC[C@]2(C)CC[C@]3(C(O)=O)C(=CC[C@@H]4[C@@]5(C)CC[C@H](O)C(C)(C)[C@@H]5[C@H](O)C[C@@]34C)[C@@H]2C1

InChI Identifier

InChI=1S/C30H48O4/c1-25(2)12-13-27(5)14-15-30(24(33)34)18(19(27)16-25)8-9-21-28(6)11-10-22(32)26(3,4)23(28)20(31)17-29(21,30)7/h8,19-23,31-32H,9-17H2,1-7H3,(H,33,34)/t19-,20+,21+,22-,23-,27+,28+,29+,30+/m0/s1

InChI Key

LUJTWDWEYNWTBP-USPQCQLHSA-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
Astilbe chinensis	LOTUS Database	35616633
Astilbe grandis	LOTUS Database	35616633
Astilbe rubra	LOTUS Database	35616633

Chemical Taxonomy

Description

Belongs to the class of organic compounds known as triterpenoids. These are terpene molecules containing six isoprene units.

Kingdom

Organic compounds

Super Class

Lipids and lipid-like molecules

Class

Prenol lipids

Sub Class

Triterpenoids

Direct Parent

Triterpenoids

Alternative Parents

Substituents

Triterpenoid
19-oxosteroid
Oxosteroid
Steroid
Cyclic alcohol
Secondary alcohol
Monocarboxylic acid or derivatives
Carboxylic acid
Carboxylic acid derivative
Organic oxide
Organic oxygen compound
Alcohol
Organooxygen compound
Carbonyl group
Hydrocarbon derivative
Aliphatic homopolycyclic compound

Molecular Framework

Aliphatic homopolycyclic 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	5.29	ChemAxon
pKa (Strongest Acidic)	4.71	ChemAxon
pKa (Strongest Basic)	-2.8	ChemAxon
Physiological Charge	-1	ChemAxon
Hydrogen Acceptor Count	4	ChemAxon
Hydrogen Donor Count	3	ChemAxon
Polar Surface Area	77.76 Å²	ChemAxon
Rotatable Bond Count	1	ChemAxon
Refractivity	135.22 m³·mol⁻¹	ChemAxon
Polarizability	55.34 Å³	ChemAxon
Number of Rings	5	ChemAxon
Bioavailability	Yes	ChemAxon
Rule of Five	No	ChemAxon
Ghose Filter	No	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

21107575

KEGG Compound ID

Not Available

BioCyc ID

Not Available

BiGG ID

Not Available

Wikipedia Link

Not Available

METLIN ID

Not Available

PubChem Compound

12016586

PDB ID

Not Available

ChEBI ID

Not Available

Good Scents ID

Not Available

References

General References

Yuk JE, Lee MY, Kwon OK, Cai XF, Jang HY, Oh SR, Lee HK, Ahn KS: Effects of astilbic acid on airway hyperresponsiveness and inflammation in a mouse model of allergic asthma. Int Immunopharmacol. 2011 Feb;11(2):266-73. doi: 10.1016/j.intimp.2010.12.002. Epub 2010 Dec 17. [PubMed:21168540 ]
Na M, Cui L, Min BS, Bae K, Yoo JK, Kim BY, Oh WK, Ahn JS: Protein tyrosine phosphatase 1B inhibitory activity of triterpenes isolated from Astilbe koreana. Bioorg Med Chem Lett. 2006 Jun 15;16(12):3273-6. doi: 10.1016/j.bmcl.2006.03.036. Epub 2006 Mar 31. [PubMed:16580200 ]
Moon TC, Lin CX, Lee JS, Kim DS, Bae K, Son KH, Kim HP, Kang SS, Son JK, Chang HW: Antiinflammatory activity of astilbic acid from Astilbe chinensis. Biol Pharm Bull. 2005 Jan;28(1):24-6. doi: 10.1248/bpb.28.24. [PubMed:15635157 ]
Zheng XL, Sun HX, Liu XL, Chen YX, Qian BC: Astilbic acid induced COLO 205 cell apoptosis by regulating Bcl-2 and Bax expression and activating caspase-3. Acta Pharmacol Sin. 2004 Aug;25(8):1090-5. [PubMed:15301745 ]
LOTUS database [Link]

Showing NP-Card for (4ar,6ar,6br,8r,8ar,10s,12ar,12br,14br)-8,10-dihydroxy-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 (NP0331056)

MOL for NP0331056 ((4ar,6ar,6br,8r,8ar,10s,12ar,12br,14br)-8,10-dihydroxy-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)

3D MOL for NP0331056 ((4ar,6ar,6br,8r,8ar,10s,12ar,12br,14br)-8,10-dihydroxy-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)

3D SDF for NP0331056 ((4ar,6ar,6br,8r,8ar,10s,12ar,12br,14br)-8,10-dihydroxy-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)

3D-SDF for NP0331056 ((4ar,6ar,6br,8r,8ar,10s,12ar,12br,14br)-8,10-dihydroxy-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)

PDB for NP0331056 ((4ar,6ar,6br,8r,8ar,10s,12ar,12br,14br)-8,10-dihydroxy-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)

3D PDB for NP0331056 ((4ar,6ar,6br,8r,8ar,10s,12ar,12br,14br)-8,10-dihydroxy-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)

SMILES for NP0331056 ((4ar,6ar,6br,8r,8ar,10s,12ar,12br,14br)-8,10-dihydroxy-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)

INCHI for NP0331056 ((4ar,6ar,6br,8r,8ar,10s,12ar,12br,14br)-8,10-dihydroxy-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)

Structure for NP0331056 ((4ar,6ar,6br,8r,8ar,10s,12ar,12br,14br)-8,10-dihydroxy-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)

3D Structure for NP0331056 ((4ar,6ar,6br,8r,8ar,10s,12ar,12br,14br)-8,10-dihydroxy-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)