NP-MRD: Showing NP-Card for 6,10-dimethyl-3-methylidene-2-oxo-3ah,4h,5h,8h,9h,11ah-cyclodeca[b]furan-4-yl acetate (NP0272786)

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Record Information

Version

2.0

Created at

2022-09-08 19:34:07 UTC

Updated at

2022-09-08 19:34:07 UTC

NP-MRD ID

NP0272786

Secondary Accession Numbers

None

Natural Product Identification

Common Name

6,10-dimethyl-3-methylidene-2-oxo-3ah,4h,5h,8h,9h,11ah-cyclodeca[b]furan-4-yl acetate

Description

Tulipinolide belongs to the class of organic compounds known as germacranolides and derivatives. These are sesquiterpene lactones with a structure based on the germacranolide skeleton, characterized by a gamma lactone fused to a 1,7-dimethylcyclodec-1-ene moiety. 6,10-dimethyl-3-methylidene-2-oxo-3ah,4h,5h,8h,9h,11ah-cyclodeca[b]furan-4-yl acetate is found in Ageratina ligustrina, Cassinia aculeata, Cassinia subtropica and Pentanema britannicum. Based on a literature review very few articles have been published on Tulipinolide.

Structure

MOL 3D MOL SDF PDB SMILES InChI

     RDKit          3D

 43 44  0  0  0  0  0  0  0  0999 V2000
    2.0565   -2.7289   -2.0970 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.2298   -2.5369   -1.0832 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.1989   -3.4209    0.0851 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.0401   -4.3130    0.3705 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.0684   -3.0733    0.7960 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.2899   -1.7251    0.5255 C   0  0  2  0  0  0  0  0  0  0  0  0
   -1.7570   -1.6566    0.5543 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4416   -0.6425    0.9943 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.9278   -0.7200    0.9604 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.8108    0.5537    1.5137 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.1454    1.7017    0.5495 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.9695    2.4990    0.1871 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0695    2.1499   -0.7281 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.1073    3.0491   -1.0253 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.2445    0.8803   -1.4390 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.8034   -0.1142   -1.0428 C   0  0  1  0  0  0  0  0  0  0  0  0
    1.4136    0.2739    0.1480 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.7590    0.4916    0.3366 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.2287    0.9029    1.6831 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.5254    0.3306   -0.6451 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.2193   -1.5036   -0.8565 C   0  0  1  0  0  0  0  0  0  0  0  0
    2.7685   -3.5334   -2.1597 H   0  0  0  0  0  0  0  0  0  0  0  0
    2.0231   -2.0376   -2.9230 H   0  0  0  0  0  0  0  0  0  0  0  0
    0.2218   -1.1341    1.2968 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.2824   -2.5514    0.1618 H   0  0  0  0  0  0  0  0  0  0  0  0
   -4.2305   -0.5104   -0.0936 H   0  0  0  0  0  0  0  0  0  0  0  0
   -4.2878   -1.7403    1.1997 H   0  0  0  0  0  0  0  0  0  0  0  0
   -4.4045    0.0647    1.5814 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.7701    0.5428    1.7878 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.3520    0.7941    2.4832 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.8849    2.4085    1.0321 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.7255    1.3268   -0.3384 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.7839    3.4687    0.6923 H   0  0  0  0  0  0  0  0  0  0  0  0
    1.8989    2.5163   -1.5515 H   0  0  0  0  0  0  0  0  0  0  0  0
    0.6986    3.8907   -1.6221 H   0  0  0  0  0  0  0  0  0  0  0  0
    1.4848    3.4328   -0.0575 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0799    1.1239   -2.5340 H   0  0  0  0  0  0  0  0  0  0  0  0
   -1.2352    0.4474   -1.3947 H   0  0  0  0  0  0  0  0  0  0  0  0
    1.5808   -0.2231   -1.8324 H   0  0  0  0  0  0  0  0  0  0  0  0
    3.0973    1.9884    1.7899 H   0  0  0  0  0  0  0  0  0  0  0  0
    4.2799    0.5734    1.8017 H   0  0  0  0  0  0  0  0  0  0  0  0
    2.6333    0.4016    2.4578 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.6448   -1.6476   -1.5649 H   0  0  0  0  0  0  0  0  0  0  0  0
 19 18  1  0
 18 20  2  0
 18 17  1  0
 17 16  1  0
 16 15  1  0
 15 13  1  0
 13 14  1  0
 13 12  2  0
 12 11  1  0
 11 10  1  0
 10  8  1  0
  8  9  1  0
  8  7  2  0
  7  6  1  0
  6  5  1  0
  5  3  1  0
  3  4  2  0
  3  2  1  0
  2  1  2  3
  2 21  1  0
 21 16  1  0
 21  6  1  0
 19 40  1  0
 19 41  1  0
 19 42  1  0
 16 39  1  6
 15 37  1  0
 15 38  1  0
 14 34  1  0
 14 35  1  0
 14 36  1  0
 12 33  1  0
 11 31  1  0
 11 32  1  0
 10 29  1  0
 10 30  1  0
  9 26  1  0
  9 27  1  0
  9 28  1  0
  7 25  1  0
  6 24  1  1
  1 22  1  0
  1 23  1  0
 21 43  1  6
M  END


  Mrv1652309082221342D          

 21 22  0  0  0  0            999 V2000
    2.8558   -0.0022    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.8173    0.8219    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.1279    1.2751    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.3561    0.9838    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.3460    2.0708    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.1701    2.1093    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.6929    2.7476    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.5070    2.6139    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.0298    3.2521    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.7983    1.8420    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.6124    1.7084    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.9037    0.9365    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.3809    0.2983    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.6722   -0.4735    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.5668    0.4320    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.2755    1.2038    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.7527    0.5656    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    4.0440   -0.2062    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.8581   -0.3399    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.5212   -0.8444    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.4614    1.3375    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  2  0  0  0  0
  2  3  1  0  0  0  0
  3  4  2  0  0  0  0
  3  5  1  0  0  0  0
  5  6  1  0  0  0  0
  6  7  1  0  0  0  0
  7  8  2  0  0  0  0
  8  9  1  0  0  0  0
  8 10  1  0  0  0  0
 10 11  1  0  0  0  0
 11 12  1  0  0  0  0
 12 13  2  0  0  0  0
 13 14  1  0  0  0  0
 13 15  1  0  0  0  0
 15 16  1  0  0  0  0
 16 17  1  0  0  0  0
 17 18  1  0  0  0  0
 18 19  1  0  0  0  0
 18 20  2  0  0  0  0
 16 21  1  0  0  0  0
  2 21  1  0  0  0  0
  6 21  1  0  0  0  0
M  END
> <DATABASE_ID>
NP0272786

> <DATABASE_NAME>
NP-MRD

> <SMILES>
CC(=O)OC1C\C(C)=C/CC\C(C)=C/C2OC(=O)C(=C)C12

> <INCHI_IDENTIFIER>
InChI=1S/C17H22O4/c1-10-6-5-7-11(2)9-15-16(12(3)17(19)21-15)14(8-10)20-13(4)18/h6,9,14-16H,3,5,7-8H2,1-2,4H3/b10-6-,11-9-

> <INCHI_KEY>
UPNVKIZABMRHNR-ZUYWJZQFSA-N

> <FORMULA>
C17H22O4

> <MOLECULAR_WEIGHT>
290.359

> <EXACT_MASS>
290.151809188

> <JCHEM_ACCEPTOR_COUNT>
2

> <JCHEM_ATOM_COUNT>
43

> <JCHEM_AVERAGE_POLARIZABILITY>
31.253929802075227

> <JCHEM_BIOAVAILABILITY>
1

> <JCHEM_DONOR_COUNT>
0

> <JCHEM_FORMAL_CHARGE>
0

> <JCHEM_GHOSE_FILTER>
1

> <JCHEM_IUPAC>
6,10-dimethyl-3-methylidene-2-oxo-2H,3H,3aH,4H,5H,8H,9H,11aH-cyclodeca[b]furan-4-yl acetate

> <JCHEM_LOGP>
2.9121302570000003

> <JCHEM_MDDR_LIKE_RULE>
0

> <JCHEM_NUMBER_OF_RINGS>
2

> <JCHEM_PHYSIOLOGICAL_CHARGE>
0

> <JCHEM_PKA_STRONGEST_BASIC>
-6.637506961514727

> <JCHEM_POLAR_SURFACE_AREA>
52.6

> <JCHEM_REFRACTIVITY>
80.6686

> <JCHEM_ROTATABLE_BOND_COUNT>
2

> <JCHEM_RULE_OF_FIVE>
1

> <JCHEM_TRADITIONAL_IUPAC>
6,10-dimethyl-3-methylidene-2-oxo-3aH,4H,5H,8H,9H,11aH-cyclodeca[b]furan-4-yl acetate

> <JCHEM_VEBER_RULE>
0

$$$$

HEADER    PROTEIN                                 08-SEP-22   NONE
TITLE     NULL                                                        
COMPND    NULL                                                        
SOURCE    NULL                                                        
KEYWDS    NULL                                                        
EXPDTA    NULL                                                        
AUTHOR    Marvin                                                      
REVDAT   1   08-SEP-22         0                                  
HETATM    1  C   UNK     0       5.331  -0.004   0.000  0.00  0.00           C+0
HETATM    2  C   UNK     0       5.259   1.534   0.000  0.00  0.00           C+0
HETATM    3  C   UNK     0       3.972   2.380   0.000  0.00  0.00           C+0
HETATM    4  O   UNK     0       2.531   1.836   0.000  0.00  0.00           O+0
HETATM    5  O   UNK     0       4.379   3.866   0.000  0.00  0.00           O+0
HETATM    6  C   UNK     0       5.917   3.937   0.000  0.00  0.00           C+0
HETATM    7  C   UNK     0       6.893   5.129   0.000  0.00  0.00           C+0
HETATM    8  C   UNK     0       8.413   4.879   0.000  0.00  0.00           C+0
HETATM    9  C   UNK     0       9.389   6.071   0.000  0.00  0.00           C+0
HETATM   10  C   UNK     0       8.957   3.438   0.000  0.00  0.00           C+0
HETATM   11  C   UNK     0      10.476   3.189   0.000  0.00  0.00           C+0
HETATM   12  C   UNK     0      11.020   1.748   0.000  0.00  0.00           C+0
HETATM   13  C   UNK     0      10.044   0.557   0.000  0.00  0.00           C+0
HETATM   14  C   UNK     0      10.588  -0.884   0.000  0.00  0.00           C+0
HETATM   15  C   UNK     0       8.525   0.806   0.000  0.00  0.00           C+0
HETATM   16  C   UNK     0       7.981   2.247   0.000  0.00  0.00           C+0
HETATM   17  O   UNK     0       7.005   1.056   0.000  0.00  0.00           O+0
HETATM   18  C   UNK     0       7.549  -0.385   0.000  0.00  0.00           C+0
HETATM   19  C   UNK     0       9.068  -0.634   0.000  0.00  0.00           C+0
HETATM   20  O   UNK     0       6.573  -1.576   0.000  0.00  0.00           O+0
HETATM   21  C   UNK     0       6.461   2.497   0.000  0.00  0.00           C+0
CONECT    1    2                                                            
CONECT    2    1    3   21                                                  
CONECT    3    2    4    5                                                  
CONECT    4    3                                                            
CONECT    5    3    6                                                       
CONECT    6    5    7   21                                                  
CONECT    7    6    8                                                       
CONECT    8    7    9   10                                                  
CONECT    9    8                                                            
CONECT   10    8   11                                                       
CONECT   11   10   12                                                       
CONECT   12   11   13                                                       
CONECT   13   12   14   15                                                  
CONECT   14   13                                                            
CONECT   15   13   16                                                       
CONECT   16   15   17   21                                                  
CONECT   17   16   18                                                       
CONECT   18   17   19   20                                                  
CONECT   19   18                                                            
CONECT   20   18                                                            
CONECT   21   16    2    6                                                  
MASTER        0    0    0    0    0    0    0    0   21    0   44    0
END

View in JSmol

Synonyms

Not Available

Chemical Formula

C₁₇H₂₂O₄

Average Mass

290.3590 Da

Monoisotopic Mass

290.15181 Da

IUPAC Name

6,10-dimethyl-3-methylidene-2-oxo-2H,3H,3aH,4H,5H,8H,9H,11aH-cyclodeca[b]furan-4-yl acetate

Traditional Name

6,10-dimethyl-3-methylidene-2-oxo-3aH,4H,5H,8H,9H,11aH-cyclodeca[b]furan-4-yl acetate

CAS Registry Number

Not Available

SMILES

CC(=O)OC1C\C(C)=C/CC\C(C)=C/C2OC(=O)C(=C)C12

InChI Identifier

InChI=1S/C17H22O4/c1-10-6-5-7-11(2)9-15-16(12(3)17(19)21-15)14(8-10)20-13(4)18/h6,9,14-16H,3,5,7-8H2,1-2,4H3/b10-6-,11-9-

InChI Key

UPNVKIZABMRHNR-ZUYWJZQFSA-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
Ageratina ligustrina	LOTUS Database	35616633
Cassinia aculeata	LOTUS Database	35616633
Cassinia subtropica	LOTUS Database	35616633
Pentanema britannicum	LOTUS Database	35616633

Chemical Taxonomy

Description

Belongs to the class of organic compounds known as germacranolides and derivatives. These are sesquiterpene lactones with a structure based on the germacranolide skeleton, characterized by a gamma lactone fused to a 1,7-dimethylcyclodec-1-ene moiety.

Kingdom

Organic compounds

Super Class

Lipids and lipid-like molecules

Class

Prenol lipids

Sub Class

Terpene lactones

Direct Parent

Germacranolides and derivatives

Alternative Parents

Substituents

Germacranolide
Sesquiterpenoid
Germacrane sesquiterpenoid
Gamma butyrolactone
Dicarboxylic acid or derivatives
Alpha,beta-unsaturated carboxylic ester
Enoate ester
Tetrahydrofuran
Lactone
Carboxylic acid ester
Oxacycle
Organoheterocyclic compound
Carboxylic acid derivative
Organic oxygen compound
Organic oxide
Hydrocarbon derivative
Organooxygen compound
Carbonyl group
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	2.91	ChemAxon
pKa (Strongest Basic)	-6.6	ChemAxon
Physiological Charge	0	ChemAxon
Hydrogen Acceptor Count	2	ChemAxon
Hydrogen Donor Count	0	ChemAxon
Polar Surface Area	52.6 Å²	ChemAxon
Rotatable Bond Count	2	ChemAxon
Refractivity	80.67 m³·mol⁻¹	ChemAxon
Polarizability	31.25 Å³	ChemAxon
Number of Rings	2	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

C00003378

Chemspider ID

4941387

KEGG Compound ID

Not Available

BioCyc ID

Not Available

BiGG ID

Not Available

Wikipedia Link

Not Available

METLIN ID

Not Available

PubChem Compound

6436774

PDB ID

Not Available

ChEBI ID

Not Available

Good Scents ID

Not Available

References

General References

LOTUS database [Link]

Showing NP-Card for 6,10-dimethyl-3-methylidene-2-oxo-3ah,4h,5h,8h,9h,11ah-cyclodeca[b]furan-4-yl acetate (NP0272786)

MOL for NP0272786 (6,10-dimethyl-3-methylidene-2-oxo-3ah,4h,5h,8h,9h,11ah-cyclodeca[b]furan-4-yl acetate)

3D MOL for NP0272786 (6,10-dimethyl-3-methylidene-2-oxo-3ah,4h,5h,8h,9h,11ah-cyclodeca[b]furan-4-yl acetate)

3D SDF for NP0272786 (6,10-dimethyl-3-methylidene-2-oxo-3ah,4h,5h,8h,9h,11ah-cyclodeca[b]furan-4-yl acetate)

3D-SDF for NP0272786 (6,10-dimethyl-3-methylidene-2-oxo-3ah,4h,5h,8h,9h,11ah-cyclodeca[b]furan-4-yl acetate)

PDB for NP0272786 (6,10-dimethyl-3-methylidene-2-oxo-3ah,4h,5h,8h,9h,11ah-cyclodeca[b]furan-4-yl acetate)

3D PDB for NP0272786 (6,10-dimethyl-3-methylidene-2-oxo-3ah,4h,5h,8h,9h,11ah-cyclodeca[b]furan-4-yl acetate)

SMILES for NP0272786 (6,10-dimethyl-3-methylidene-2-oxo-3ah,4h,5h,8h,9h,11ah-cyclodeca[b]furan-4-yl acetate)

INCHI for NP0272786 (6,10-dimethyl-3-methylidene-2-oxo-3ah,4h,5h,8h,9h,11ah-cyclodeca[b]furan-4-yl acetate)

Structure for NP0272786 (6,10-dimethyl-3-methylidene-2-oxo-3ah,4h,5h,8h,9h,11ah-cyclodeca[b]furan-4-yl acetate)

3D Structure for NP0272786 (6,10-dimethyl-3-methylidene-2-oxo-3ah,4h,5h,8h,9h,11ah-cyclodeca[b]furan-4-yl acetate)