NP-MRD: Showing NP-Card for (2s)-2-[(1r,3as,5as,9as,11as)-3a,6,6,9a,11a-pentamethyl-7-oxo-1h,2h,3h,4h,5h,5ah,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-6-methylhept-5-enoic acid (NP0145622)

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Record Information

Version

2.0

Created at

2022-09-02 00:51:44 UTC

Updated at

2022-09-02 00:51:44 UTC

NP-MRD ID

NP0145622

Secondary Accession Numbers

None

Natural Product Identification

Common Name

(2s)-2-[(1r,3as,5as,9as,11as)-3a,6,6,9a,11a-pentamethyl-7-oxo-1h,2h,3h,4h,5h,5ah,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-6-methylhept-5-enoic acid

Description

Beta-Elemonic acid, also known as b-elemonate, belongs to the class of organic compounds known as triterpenoids. These are terpene molecules containing six isoprene units. (2s)-2-[(1r,3as,5as,9as,11as)-3a,6,6,9a,11a-pentamethyl-7-oxo-1h,2h,3h,4h,5h,5ah,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-6-methylhept-5-enoic acid is found in Boswellia papyrifera. (2s)-2-[(1r,3as,5as,9as,11as)-3a,6,6,9a,11a-pentamethyl-7-oxo-1h,2h,3h,4h,5h,5ah,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-6-methylhept-5-enoic acid was first documented in 2019 (PMID: 30917586). Based on a literature review a small amount of articles have been published on beta-Elemonic acid (PMID: 35242040) (PMID: 33878321) (PMID: 33578281) (PMID: 32113150).

Structure

MOL 3D MOL SDF PDB SMILES InChI


  Mrv1652309022202512D          

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  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
  2  4  2  0  0  0  0
  4  5  1  0  0  0  0
  5  6  1  0  0  0  0
  7  6  1  6  0  0  0
  7  8  1  0  0  0  0
  8  9  2  0  0  0  0
  8 10  1  0  0  0  0
 11  7  1  6  0  0  0
 11 12  1  0  0  0  0
 12 13  1  0  0  0  0
 13 14  1  0  0  0  0
 14 15  1  6  0  0  0
 14 16  1  0  0  0  0
 16 17  2  0  0  0  0
 17 18  1  0  0  0  0
 18 19  1  0  0  0  0
 19 20  1  0  0  0  0
 11 20  1  0  0  0  0
 14 20  1  0  0  0  0
 20 21  1  1  0  0  0
 17 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
 25 26  1  0  0  0  0
 26 27  2  0  0  0  0
 26 28  1  0  0  0  0
 28 29  1  0  0  0  0
 28 30  1  0  0  0  0
 28 31  1  0  0  0  0
 22 31  1  0  0  0  0
 31 32  1  1  0  0  0
 32 33  1  0  0  0  0
 16 33  1  0  0  0  0
M  END
> <DATABASE_ID>
NP0145622

> <DATABASE_NAME>
NP-MRD

> <SMILES>
CC(C)=CCC[C@@H]([C@H]1CC[C@]2(C)C3=C(CC[C@@]12C)[C@@]1(C)CCC(=O)C(C)(C)[C@H]1CC3)C(O)=O

> <INCHI_IDENTIFIER>
InChI=1S/C30H46O3/c1-19(2)9-8-10-20(26(32)33)21-13-17-30(7)23-11-12-24-27(3,4)25(31)15-16-28(24,5)22(23)14-18-29(21,30)6/h9,20-21,24H,8,10-18H2,1-7H3,(H,32,33)/t20-,21+,24+,28+,29-,30+/m0/s1

> <INCHI_KEY>
XLPAINGDLCDYQV-DXXDIINSSA-N

> <FORMULA>
C30H46O3

> <MOLECULAR_WEIGHT>
454.695

> <EXACT_MASS>
454.344695341

> <JCHEM_ACCEPTOR_COUNT>
3

> <JCHEM_ATOM_COUNT>
79

> <JCHEM_AVERAGE_POLARIZABILITY>
54.322424487493436

> <JCHEM_BIOAVAILABILITY>
1

> <JCHEM_DONOR_COUNT>
1

> <JCHEM_FORMAL_CHARGE>
0

> <JCHEM_GHOSE_FILTER>
0

> <JCHEM_IUPAC>
(2S)-6-methyl-2-[(2S,7S,11S,14R,15S)-2,6,6,11,15-pentamethyl-5-oxotetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadec-1(10)-en-14-yl]hept-5-enoic acid

> <ALOGPS_LOGP>
7.11

> <JCHEM_LOGP>
7.205925643666667

> <ALOGPS_LOGS>
-5.53

> <JCHEM_MDDR_LIKE_RULE>
0

> <JCHEM_NUMBER_OF_RINGS>
4

> <JCHEM_PHYSIOLOGICAL_CHARGE>
-1

> <JCHEM_PKA>
19.692856217771887

> <JCHEM_PKA_STRONGEST_ACIDIC>
4.85168311508123

> <JCHEM_PKA_STRONGEST_BASIC>
-7.471290151345293

> <JCHEM_POLAR_SURFACE_AREA>
54.37

> <JCHEM_REFRACTIVITY>
135.4137

> <JCHEM_ROTATABLE_BOND_COUNT>
5

> <JCHEM_RULE_OF_FIVE>
0

> <ALOGPS_SOLUBILITY>
1.34e-03 g/l

> <JCHEM_TRADITIONAL_IUPAC>
(2S)-6-methyl-2-[(2S,7S,11S,14R,15S)-2,6,6,11,15-pentamethyl-5-oxotetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadec-1(10)-en-14-yl]hept-5-enoic acid

> <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      16.349  -3.280   0.000  0.00  0.00           C+0
HETATM    2  C   UNK     0      14.823  -3.490   0.000  0.00  0.00           C+0
HETATM    3  C   UNK     0      14.243  -4.917   0.000  0.00  0.00           C+0
HETATM    4  C   UNK     0      13.878  -2.275   0.000  0.00  0.00           C+0
HETATM    5  C   UNK     0      12.353  -2.485   0.000  0.00  0.00           C+0
HETATM    6  C   UNK     0      11.407  -1.269   0.000  0.00  0.00           C+0
HETATM    7  C   UNK     0       9.882  -1.480   0.000  0.00  0.00           C+0
HETATM    8  C   UNK     0       9.302  -2.907   0.000  0.00  0.00           C+0
HETATM    9  O   UNK     0      10.247  -4.122   0.000  0.00  0.00           O+0
HETATM   10  O   UNK     0       7.776  -3.117   0.000  0.00  0.00           O+0
HETATM   11  C   UNK     0       8.937  -0.264   0.000  0.00  0.00           C+0
HETATM   12  C   UNK     0       9.365   1.215   0.000  0.00  0.00           C+0
HETATM   13  C   UNK     0       8.090   2.079   0.000  0.00  0.00           C+0
HETATM   14  C   UNK     0       6.874   1.134   0.000  0.00  0.00           C+0
HETATM   15  C   UNK     0       6.505   2.629   0.000  0.00  0.00           C+0
HETATM   16  C   UNK     0       5.358   1.405   0.000  0.00  0.00           C+0
HETATM   17  C   UNK     0       4.366   0.228   0.000  0.00  0.00           C+0
HETATM   18  C   UNK     0       4.889  -1.221   0.000  0.00  0.00           C+0
HETATM   19  C   UNK     0       6.405  -1.492   0.000  0.00  0.00           C+0
HETATM   20  C   UNK     0       7.398  -0.314   0.000  0.00  0.00           C+0
HETATM   21  C   UNK     0       8.069  -1.700   0.000  0.00  0.00           C+0
HETATM   22  C   UNK     0       2.850   0.499   0.000  0.00  0.00           C+0
HETATM   23  C   UNK     0       3.373  -0.949   0.000  0.00  0.00           C+0
HETATM   24  C   UNK     0       1.857  -0.678   0.000  0.00  0.00           C+0
HETATM   25  C   UNK     0       0.341  -0.407   0.000  0.00  0.00           C+0
HETATM   26  C   UNK     0      -0.182   1.041   0.000  0.00  0.00           C+0
HETATM   27  O   UNK     0      -1.698   1.312   0.000  0.00  0.00           O+0
HETATM   28  C   UNK     0       0.810   2.218   0.000  0.00  0.00           C+0
HETATM   29  C   UNK     0      -0.521   2.992   0.000  0.00  0.00           C+0
HETATM   30  C   UNK     0       1.341   3.664   0.000  0.00  0.00           C+0
HETATM   31  C   UNK     0       2.326   1.947   0.000  0.00  0.00           C+0
HETATM   32  C   UNK     0       3.319   3.125   0.000  0.00  0.00           C+0
HETATM   33  C   UNK     0       4.835   2.854   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                                                       
CONECT    6    5    7                                                       
CONECT    7    6    8   11                                                  
CONECT    8    7    9   10                                                  
CONECT    9    8                                                            
CONECT   10    8                                                            
CONECT   11    7   12   20                                                  
CONECT   12   11   13                                                       
CONECT   13   12   14                                                       
CONECT   14   13   15   16   20                                             
CONECT   15   14                                                            
CONECT   16   14   17   33                                                  
CONECT   17   16   18   22                                                  
CONECT   18   17   19                                                       
CONECT   19   18   20                                                       
CONECT   20   19   11   14   21                                             
CONECT   21   20                                                            
CONECT   22   17   23   24   31                                             
CONECT   23   22                                                            
CONECT   24   22   25                                                       
CONECT   25   24   26                                                       
CONECT   26   25   27   28                                                  
CONECT   27   26                                                            
CONECT   28   26   29   30   31                                             
CONECT   29   28                                                            
CONECT   30   28                                                            
CONECT   31   28   22   32                                                  
CONECT   32   31   33                                                       
CONECT   33   32   16                                                       
MASTER        0    0    0    0    0    0    0    0   33    0   72    0
END

View in JSmol

Synonyms

Value	Source
b-Elemonate	Generator
b-Elemonic acid	Generator
beta-Elemonate	Generator
Β-elemonate	Generator
Β-elemonic acid	Generator

Chemical Formula

C₃₀H₄₆O₃

Average Mass

454.6950 Da

Monoisotopic Mass

454.34470 Da

IUPAC Name

(2S)-6-methyl-2-[(2S,7S,11S,14R,15S)-2,6,6,11,15-pentamethyl-5-oxotetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadec-1(10)-en-14-yl]hept-5-enoic acid

Traditional Name

(2S)-6-methyl-2-[(2S,7S,11S,14R,15S)-2,6,6,11,15-pentamethyl-5-oxotetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadec-1(10)-en-14-yl]hept-5-enoic acid

CAS Registry Number

Not Available

SMILES

CC(C)=CCC[C@@H]([C@H]1CC[C@]2(C)C3=C(CC[C@@]12C)[C@@]1(C)CCC(=O)C(C)(C)[C@H]1CC3)C(O)=O

InChI Identifier

InChI=1S/C30H46O3/c1-19(2)9-8-10-20(26(32)33)21-13-17-30(7)23-11-12-24-27(3,4)25(31)15-16-28(24,5)22(23)14-18-29(21,30)6/h9,20-21,24H,8,10-18H2,1-7H3,(H,32,33)/t20-,21+,24+,28+,29-,30+/m0/s1

InChI Key

XLPAINGDLCDYQV-DXXDIINSSA-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
Boswellia papyrifera	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
Bile acid, alcohol, or derivatives
Steroid acid
3-oxosteroid
Oxosteroid
3-oxo-5-beta-steroid
Steroid
Medium-chain fatty acid
Fatty acyl
Fatty acid
Unsaturated fatty acid
Ketone
Cyclic ketone
Monocarboxylic acid or derivatives
Carboxylic acid
Carboxylic acid derivative
Organooxygen compound
Organic oxygen compound
Carbonyl group
Organic oxide
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	7.11	ALOGPS
logP	7.21	ChemAxon
logS	-5.5	ALOGPS
pKa (Strongest Acidic)	4.85	ChemAxon
pKa (Strongest Basic)	-7.5	ChemAxon
Physiological Charge	-1	ChemAxon
Hydrogen Acceptor Count	3	ChemAxon
Hydrogen Donor Count	1	ChemAxon
Polar Surface Area	54.37 Å²	ChemAxon
Rotatable Bond Count	5	ChemAxon
Refractivity	135.41 m³·mol⁻¹	ChemAxon
Polarizability	54.32 Å³	ChemAxon
Number of Rings	4	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

C00042279

Chemspider ID

24631445

KEGG Compound ID

Not Available

BioCyc ID

Not Available

BiGG ID

Not Available

Wikipedia Link

Not Available

METLIN ID

Not Available

PubChem Compound

24721570

PDB ID

Not Available

ChEBI ID

Not Available

Good Scents ID

Not Available

References

General References

Xia Y, Yang J, Li C, Hao X, Fan H, Zhao Y, Tang J, Wan X, Lian S, Yang J: TMT-Based Quantitative Proteomics Analysis Reveals the Panoramic Pharmacological Molecular Mechanism of beta-Elemonic Acid Inhibition of Colorectal Cancer. Front Pharmacol. 2022 Feb 15;13:830328. doi: 10.3389/fphar.2022.830328. eCollection 2022. [PubMed:35242040 ]
Bao X, Zhu J, Ren C, Zhao A, Zhang M, Zhu Z, Lu X, Zhang Y, Li X, Sima X, Li J, Zhang Q, Ma B: beta-elemonic acid inhibits growth and triggers apoptosis in human castration-resistant prostate cancer cells through the suppression of JAK2/STAT3/MCL-1 and NF-kB signal pathways. Chem Biol Interact. 2021 Jun 1;342:109477. doi: 10.1016/j.cbi.2021.109477. Epub 2021 Apr 18. [PubMed:33878321 ]
Zhang Y, Huo XX, Cheng LY, Chen MY, Song L, Yu YL, Zhou K: Development and validation of a sensitive UHPLC-MS/MS method for the measurement of beta-elemonic acid in rat plasma and tissues and its application to pharmacokinetics and tissue distribution study. J Chromatogr B Analyt Technol Biomed Life Sci. 2021 Mar 15;1167:122566. doi: 10.1016/j.jchromb.2021.122566. Epub 2021 Feb 1. [PubMed:33578281 ]
Zhao A, Zhang Z, Zhou Y, Li X, Li X, Ma B, Zhang Q: beta-Elemonic acid inhibits the growth of human Osteosarcoma through endoplasmic reticulum (ER) stress-mediated PERK/eIF2alpha/ATF4/CHOP activation and Wnt/beta-catenin signal suppression. Phytomedicine. 2020 Apr;69:153183. doi: 10.1016/j.phymed.2020.153183. Epub 2020 Feb 7. [PubMed:32113150 ]
Zhang Y, Yu YL, Tian H, Bai RY, Bi YN, Yuan XM, Sun LK, Deng YR, Zhou K: Evaluation of Anti-Inflammatory Activities of a Triterpene beta-Elemonic Acid in Frankincense In Vivo and In Vitro. Molecules. 2019 Mar 26;24(6). pii: molecules24061187. doi: 10.3390/molecules24061187. [PubMed:30917586 ]
LOTUS database [Link]

Showing NP-Card for (2s)-2-[(1r,3as,5as,9as,11as)-3a,6,6,9a,11a-pentamethyl-7-oxo-1h,2h,3h,4h,5h,5ah,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-6-methylhept-5-enoic acid (NP0145622)

MOL for NP0145622 ((2s)-2-[(1r,3as,5as,9as,11as)-3a,6,6,9a,11a-pentamethyl-7-oxo-1h,2h,3h,4h,5h,5ah,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-6-methylhept-5-enoic acid)

3D MOL for NP0145622 ((2s)-2-[(1r,3as,5as,9as,11as)-3a,6,6,9a,11a-pentamethyl-7-oxo-1h,2h,3h,4h,5h,5ah,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-6-methylhept-5-enoic acid)

3D SDF for NP0145622 ((2s)-2-[(1r,3as,5as,9as,11as)-3a,6,6,9a,11a-pentamethyl-7-oxo-1h,2h,3h,4h,5h,5ah,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-6-methylhept-5-enoic acid)

3D-SDF for NP0145622 ((2s)-2-[(1r,3as,5as,9as,11as)-3a,6,6,9a,11a-pentamethyl-7-oxo-1h,2h,3h,4h,5h,5ah,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-6-methylhept-5-enoic acid)

PDB for NP0145622 ((2s)-2-[(1r,3as,5as,9as,11as)-3a,6,6,9a,11a-pentamethyl-7-oxo-1h,2h,3h,4h,5h,5ah,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-6-methylhept-5-enoic acid)

3D PDB for NP0145622 ((2s)-2-[(1r,3as,5as,9as,11as)-3a,6,6,9a,11a-pentamethyl-7-oxo-1h,2h,3h,4h,5h,5ah,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-6-methylhept-5-enoic acid)

SMILES for NP0145622 ((2s)-2-[(1r,3as,5as,9as,11as)-3a,6,6,9a,11a-pentamethyl-7-oxo-1h,2h,3h,4h,5h,5ah,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-6-methylhept-5-enoic acid)

INCHI for NP0145622 ((2s)-2-[(1r,3as,5as,9as,11as)-3a,6,6,9a,11a-pentamethyl-7-oxo-1h,2h,3h,4h,5h,5ah,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-6-methylhept-5-enoic acid)

Structure for NP0145622 ((2s)-2-[(1r,3as,5as,9as,11as)-3a,6,6,9a,11a-pentamethyl-7-oxo-1h,2h,3h,4h,5h,5ah,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-6-methylhept-5-enoic acid)

3D Structure for NP0145622 ((2s)-2-[(1r,3as,5as,9as,11as)-3a,6,6,9a,11a-pentamethyl-7-oxo-1h,2h,3h,4h,5h,5ah,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-6-methylhept-5-enoic acid)