NP-MRD: Showing NP-Card for 6-[7-(acetyloxy)-3a,6,6,9a,11a-pentamethyl-1h,2h,3h,4h,5h,5ah,7h,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-5-hydroxy-2-methylhept-2-enoic acid (NP0184894)

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Record Information

Version

1.0

Created at

2022-09-04 00:08:29 UTC

Updated at

2022-09-04 00:08:29 UTC

NP-MRD ID

NP0184894

Secondary Accession Numbers

None

Natural Product Identification

Common Name

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

Description

6-[5-(Acetyloxy)-2,6,6,11,15-pentamethyltetracyclo[8.7.0.0²,⁷.0¹¹,¹⁵]Heptadec-1(10)-en-14-yl]-5-hydroxy-2-methylhept-2-enoic acid belongs to the class of organic compounds known as triterpenoids. These are terpene molecules containing six isoprene units. 6-[7-(acetyloxy)-3a,6,6,9a,11a-pentamethyl-1h,2h,3h,4h,5h,5ah,7h,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-5-hydroxy-2-methylhept-2-enoic acid is found in Astraeus odoratus. Based on a literature review very few articles have been published on 6-[5-(acetyloxy)-2,6,6,11,15-pentamethyltetracyclo[8.7.0.0²,⁷.0¹¹,¹⁵]Heptadec-1(10)-en-14-yl]-5-hydroxy-2-methylhept-2-enoic acid.

Structure

MOL 3D MOL SDF PDB SMILES InChI


  Mrv1652309042202082D          

 37 40  0  0  0  0            999 V2000
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M  END

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M  END


  Mrv1652309042202082D          

 37 40  0  0  0  0            999 V2000
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    0.9451    0.5269    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.0962    0.8215    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.5867    1.2845    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.3574    2.0770    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.8637    2.7283    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.5528    3.4925    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.6810    2.6155    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.9919    1.8513    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -2.1873    3.2668    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.0046    3.1540    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.5109    3.8053    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.2000    4.5695    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -4.3282    3.6924    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -4.6391    2.9283    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -4.8345    4.3438    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.4672    2.1038    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.1073    2.8462    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.9990    2.7345    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.8111    2.5893    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
  8 10  1  0  0  0  0
 10 11  2  0  0  0  0
 11 12  1  0  0  0  0
 12 13  1  0  0  0  0
 13 14  1  0  0  0  0
  8 14  1  0  0  0  0
 14 15  1  0  0  0  0
  5 15  1  0  0  0  0
 15 16  1  0  0  0  0
 15 17  1  0  0  0  0
 11 18  1  0  0  0  0
 18 19  1  0  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  0  0  0  0
 23 24  1  0  0  0  0
 23 25  1  0  0  0  0
 25 26  1  0  0  0  0
 25 27  1  0  0  0  0
 28 27  1  4  0  0  0
 28 29  2  0  0  0  0
 29 30  1  0  0  0  0
 29 31  1  0  0  0  0
 31 32  2  0  0  0  0
 31 33  1  0  0  0  0
 22 34  1  0  0  0  0
 18 34  1  0  0  0  0
 34 35  1  0  0  0  0
 34 36  1  0  0  0  0
 36 37  1  0  0  0  0
 10 37  1  0  0  0  0
M  END
> <DATABASE_ID>
NP0184894

> <DATABASE_NAME>
NP-MRD

> <SMILES>
CC(C(O)CC=C(C)C(O)=O)C1CCC2(C)C3=C(CCC12C)C1(C)CCC(OC(C)=O)C(C)(C)C1CC3

> <INCHI_IDENTIFIER>
InChI=1S/C32H50O5/c1-19(28(35)36)9-11-25(34)20(2)22-13-17-32(8)24-10-12-26-29(4,5)27(37-21(3)33)15-16-30(26,6)23(24)14-18-31(22,32)7/h9,20,22,25-27,34H,10-18H2,1-8H3,(H,35,36)

> <INCHI_KEY>
PDMGRFIQUHQMLF-UHFFFAOYSA-N

> <FORMULA>
C32H50O5

> <MOLECULAR_WEIGHT>
514.747

> <EXACT_MASS>
514.36582471

> <JCHEM_ACCEPTOR_COUNT>
4

> <JCHEM_ATOM_COUNT>
87

> <JCHEM_AVERAGE_POLARIZABILITY>
60.46660155966561

> <JCHEM_BIOAVAILABILITY>
0

> <JCHEM_DONOR_COUNT>
2

> <JCHEM_FORMAL_CHARGE>
0

> <JCHEM_GHOSE_FILTER>
0

> <JCHEM_IUPAC>
6-[5-(acetyloxy)-2,6,6,11,15-pentamethyltetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadec-1(10)-en-14-yl]-5-hydroxy-2-methylhept-2-enoic acid

> <JCHEM_LOGP>
6.030725733333334

> <JCHEM_MDDR_LIKE_RULE>
1

> <JCHEM_NUMBER_OF_RINGS>
4

> <JCHEM_PHYSIOLOGICAL_CHARGE>
-1

> <JCHEM_PKA>
19.42328439632149

> <JCHEM_PKA_STRONGEST_ACIDIC>
4.674448154834308

> <JCHEM_PKA_STRONGEST_BASIC>
-0.8640564664321903

> <JCHEM_POLAR_SURFACE_AREA>
83.83

> <JCHEM_REFRACTIVITY>
147.0059

> <JCHEM_ROTATABLE_BOND_COUNT>
7

> <JCHEM_RULE_OF_FIVE>
0

> <JCHEM_TRADITIONAL_IUPAC>
6-[5-(acetyloxy)-2,6,6,11,15-pentamethyltetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadec-1(10)-en-14-yl]-5-hydroxy-2-methylhept-2-enoic acid

> <JCHEM_VEBER_RULE>
0

$$$$

HEADER    PROTEIN                                 04-SEP-22   NONE
TITLE     NULL                                                        
COMPND    NULL                                                        
SOURCE    NULL                                                        
KEYWDS    NULL                                                        
EXPDTA    NULL                                                        
AUTHOR    Marvin                                                      
REVDAT   1   04-SEP-22         0                                  
HETATM    1  C   UNK     0      12.007   0.581   0.000  0.00  0.00           C+0
HETATM    2  C   UNK     0      10.491   0.852   0.000  0.00  0.00           C+0
HETATM    3  O   UNK     0       9.498  -0.325   0.000  0.00  0.00           O+0
HETATM    4  O   UNK     0       9.968   2.301   0.000  0.00  0.00           O+0
HETATM    5  C   UNK     0       8.452   2.572   0.000  0.00  0.00           C+0
HETATM    6  C   UNK     0       7.929   4.020   0.000  0.00  0.00           C+0
HETATM    7  C   UNK     0       6.413   4.291   0.000  0.00  0.00           C+0
HETATM    8  C   UNK     0       5.420   3.114   0.000  0.00  0.00           C+0
HETATM    9  C   UNK     0       4.897   4.562   0.000  0.00  0.00           C+0
HETATM   10  C   UNK     0       3.904   3.385   0.000  0.00  0.00           C+0
HETATM   11  C   UNK     0       2.911   2.208   0.000  0.00  0.00           C+0
HETATM   12  C   UNK     0       3.434   0.759   0.000  0.00  0.00           C+0
HETATM   13  C   UNK     0       4.950   0.488   0.000  0.00  0.00           C+0
HETATM   14  C   UNK     0       5.943   1.666   0.000  0.00  0.00           C+0
HETATM   15  C   UNK     0       7.459   1.394   0.000  0.00  0.00           C+0
HETATM   16  C   UNK     0       7.241  -0.130   0.000  0.00  0.00           C+0
HETATM   17  C   UNK     0       8.601   0.361   0.000  0.00  0.00           C+0
HETATM   18  C   UNK     0       1.395   2.479   0.000  0.00  0.00           C+0
HETATM   19  C   UNK     0       1.764   0.984   0.000  0.00  0.00           C+0
HETATM   20  C   UNK     0       0.179   1.534   0.000  0.00  0.00           C+0
HETATM   21  C   UNK     0      -1.095   2.398   0.000  0.00  0.00           C+0
HETATM   22  C   UNK     0      -0.667   3.877   0.000  0.00  0.00           C+0
HETATM   23  C   UNK     0      -1.612   5.093   0.000  0.00  0.00           C+0
HETATM   24  C   UNK     0      -1.032   6.519   0.000  0.00  0.00           C+0
HETATM   25  C   UNK     0      -3.138   4.882   0.000  0.00  0.00           C+0
HETATM   26  O   UNK     0      -3.718   3.456   0.000  0.00  0.00           O+0
HETATM   27  C   UNK     0      -4.083   6.098   0.000  0.00  0.00           C+0
HETATM   28  C   UNK     0      -5.609   5.887   0.000  0.00  0.00           C+0
HETATM   29  C   UNK     0      -6.554   7.103   0.000  0.00  0.00           C+0
HETATM   30  C   UNK     0      -5.973   8.530   0.000  0.00  0.00           C+0
HETATM   31  C   UNK     0      -8.079   6.893   0.000  0.00  0.00           C+0
HETATM   32  O   UNK     0      -8.660   5.466   0.000  0.00  0.00           O+0
HETATM   33  O   UNK     0      -9.024   8.108   0.000  0.00  0.00           O+0
HETATM   34  C   UNK     0       0.872   3.927   0.000  0.00  0.00           C+0
HETATM   35  C   UNK     0       0.200   5.313   0.000  0.00  0.00           C+0
HETATM   36  C   UNK     0       1.865   5.104   0.000  0.00  0.00           C+0
HETATM   37  C   UNK     0       3.381   4.833   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   15                                                  
CONECT    6    5    7                                                       
CONECT    7    6    8                                                       
CONECT    8    7    9   10   14                                             
CONECT    9    8                                                            
CONECT   10    8   11   37                                                  
CONECT   11   10   12   18                                                  
CONECT   12   11   13                                                       
CONECT   13   12   14                                                       
CONECT   14   13    8   15                                                  
CONECT   15   14    5   16   17                                             
CONECT   16   15                                                            
CONECT   17   15                                                            
CONECT   18   11   19   20   34                                             
CONECT   19   18                                                            
CONECT   20   18   21                                                       
CONECT   21   20   22                                                       
CONECT   22   21   23   34                                                  
CONECT   23   22   24   25                                                  
CONECT   24   23                                                            
CONECT   25   23   26   27                                                  
CONECT   26   25                                                            
CONECT   27   25   28                                                       
CONECT   28   27   29                                                       
CONECT   29   28   30   31                                                  
CONECT   30   29                                                            
CONECT   31   29   32   33                                                  
CONECT   32   31                                                            
CONECT   33   31                                                            
CONECT   34   22   18   35   36                                             
CONECT   35   34                                                            
CONECT   36   34   37                                                       
CONECT   37   36   10                                                       
MASTER        0    0    0    0    0    0    0    0   37    0   80    0
END

View in JSmol

Synonyms

Value	Source
6-[5-(Acetyloxy)-2,6,6,11,15-pentamethyltetracyclo[8.7.0.0,.0,]heptadec-1(10)-en-14-yl]-5-hydroxy-2-methylhept-2-enoate	Generator

Chemical Formula

C₃₂H₅₀O₅

Average Mass

514.7470 Da

Monoisotopic Mass

514.36582 Da

IUPAC Name

6-[5-(acetyloxy)-2,6,6,11,15-pentamethyltetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadec-1(10)-en-14-yl]-5-hydroxy-2-methylhept-2-enoic acid

Traditional Name

6-[5-(acetyloxy)-2,6,6,11,15-pentamethyltetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadec-1(10)-en-14-yl]-5-hydroxy-2-methylhept-2-enoic acid

CAS Registry Number

Not Available

SMILES

CC(C(O)CC=C(C)C(O)=O)C1CCC2(C)C3=C(CCC12C)C1(C)CCC(OC(C)=O)C(C)(C)C1CC3

InChI Identifier

InChI=1S/C32H50O5/c1-19(28(35)36)9-11-25(34)20(2)22-13-17-32(8)24-10-12-26-29(4,5)27(37-21(3)33)15-16-30(26,6)23(24)14-18-31(22,32)7/h9,20,22,25-27,34H,10-18H2,1-8H3,(H,35,36)

InChI Key

PDMGRFIQUHQMLF-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
Astraeus odoratus	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
Monohydroxy bile acid, alcohol, or derivatives
Hydroxy bile acid, alcohol, or derivatives
22-hydroxysteroid
Bile acid, alcohol, or derivatives
Steroid ester
Steroid acid
Hydroxysteroid
Steroid
Medium-chain fatty acid
Hydroxy fatty acid
Fatty acyl
Fatty acid
Unsaturated fatty acid
Dicarboxylic acid or derivatives
Secondary alcohol
Carboxylic acid ester
Carboxylic acid
Carboxylic acid derivative
Organic oxygen compound
Organic oxide
Hydrocarbon derivative
Organooxygen compound
Carbonyl group
Alcohol
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	6.03	ChemAxon
pKa (Strongest Acidic)	4.67	ChemAxon
pKa (Strongest Basic)	-0.86	ChemAxon
Physiological Charge	-1	ChemAxon
Hydrogen Acceptor Count	4	ChemAxon
Hydrogen Donor Count	2	ChemAxon
Polar Surface Area	83.83 Å²	ChemAxon
Rotatable Bond Count	7	ChemAxon
Refractivity	147.01 m³·mol⁻¹	ChemAxon
Polarizability	60.47 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

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

163045021

PDB ID

Not Available

ChEBI ID

Not Available

Good Scents ID

Not Available

References

General References

LOTUS database [Link]

Showing NP-Card for 6-[7-(acetyloxy)-3a,6,6,9a,11a-pentamethyl-1h,2h,3h,4h,5h,5ah,7h,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-5-hydroxy-2-methylhept-2-enoic acid (NP0184894)

MOL for NP0184894 (6-[7-(acetyloxy)-3a,6,6,9a,11a-pentamethyl-1h,2h,3h,4h,5h,5ah,7h,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-5-hydroxy-2-methylhept-2-enoic acid)

3D MOL for NP0184894 (6-[7-(acetyloxy)-3a,6,6,9a,11a-pentamethyl-1h,2h,3h,4h,5h,5ah,7h,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-5-hydroxy-2-methylhept-2-enoic acid)

3D SDF for NP0184894 (6-[7-(acetyloxy)-3a,6,6,9a,11a-pentamethyl-1h,2h,3h,4h,5h,5ah,7h,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-5-hydroxy-2-methylhept-2-enoic acid)

3D-SDF for NP0184894 (6-[7-(acetyloxy)-3a,6,6,9a,11a-pentamethyl-1h,2h,3h,4h,5h,5ah,7h,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-5-hydroxy-2-methylhept-2-enoic acid)

PDB for NP0184894 (6-[7-(acetyloxy)-3a,6,6,9a,11a-pentamethyl-1h,2h,3h,4h,5h,5ah,7h,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-5-hydroxy-2-methylhept-2-enoic acid)

3D PDB for NP0184894 (6-[7-(acetyloxy)-3a,6,6,9a,11a-pentamethyl-1h,2h,3h,4h,5h,5ah,7h,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-5-hydroxy-2-methylhept-2-enoic acid)

SMILES for NP0184894 (6-[7-(acetyloxy)-3a,6,6,9a,11a-pentamethyl-1h,2h,3h,4h,5h,5ah,7h,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-5-hydroxy-2-methylhept-2-enoic acid)

INCHI for NP0184894 (6-[7-(acetyloxy)-3a,6,6,9a,11a-pentamethyl-1h,2h,3h,4h,5h,5ah,7h,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-5-hydroxy-2-methylhept-2-enoic acid)

Structure for NP0184894 (6-[7-(acetyloxy)-3a,6,6,9a,11a-pentamethyl-1h,2h,3h,4h,5h,5ah,7h,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-5-hydroxy-2-methylhept-2-enoic acid)

3D Structure for NP0184894 (6-[7-(acetyloxy)-3a,6,6,9a,11a-pentamethyl-1h,2h,3h,4h,5h,5ah,7h,8h,9h,10h,11h-cyclopenta[a]phenanthren-1-yl]-5-hydroxy-2-methylhept-2-enoic acid)