NP-MRD: Showing NP-Card for 7-[3-(hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-2,8-dihydro-1h-naphthalen-2-yl 4,6-dimethylocta-2,4-dienoate (NP0236280)

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Record Information

Version

2.0

Created at

2022-09-06 19:08:15 UTC

Updated at

2022-09-06 19:08:15 UTC

NP-MRD ID

NP0236280

Secondary Accession Numbers

None

Natural Product Identification

Common Name

7-[3-(hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-2,8-dihydro-1h-naphthalen-2-yl 4,6-dimethylocta-2,4-dienoate

Description

7-[3-(Hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-1,2,6,7,8,8a-hexahydronaphthalen-2-yl 4,6-dimethylocta-2,4-dienoate belongs to the class of organic compounds known as eremophilane, 8,9-secoeremophilane and furoeremophilane sesquiterpenoids. These are sesquiterpenoids with a structure based either on the eremophilane skeleton, its 8,9-seco derivative, or the furoeremophilane skeleton. Eremophilanes have been shown to be derived from eudesmanes by migration of the methyl group at C-10 to C-5. 7-[3-(hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-2,8-dihydro-1h-naphthalen-2-yl 4,6-dimethylocta-2,4-dienoate is found in Curvularia lunata. Based on a literature review very few articles have been published on 7-[3-(hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-1,2,6,7,8,8a-hexahydronaphthalen-2-yl 4,6-dimethylocta-2,4-dienoate.

Structure

MOL 3D MOL SDF PDB SMILES InChI


  Mrv1652309062221082D          

 32 33  0  0  0  0            999 V2000
   -1.8091   -2.1560    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.9966   -2.0127    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.4663   -2.6447    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.7485   -3.4200    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
   -0.2182   -4.0520    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.7145   -1.2375    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.5269   -1.0942    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -2.0572   -1.7262    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000   -1.6500    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.7145   -1.2375    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.7145   -2.0625    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.7145   -0.4125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000   -0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.7145   -0.4125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.4289    0.0000    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.4289   -0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.1434   -0.4125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.1434   -1.2375    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.8579   -1.6500    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.5724   -1.2375    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.2868   -1.6500    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.5724   -0.4125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.2868   -0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.2868    0.8250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.5724    1.2375    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.0013    1.2375    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.0013    2.0625    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.2868    2.4750    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.7158    2.4750    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.7158    3.3000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4289   -1.6500    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4289   -2.4750    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
  4  5  1  4  0  0  0
  2  6  1  0  0  0  0
  6  7  1  0  0  0  0
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  9 10  1  0  0  0  0
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 12 13  2  0  0  0  0
 13 14  1  0  0  0  0
  6 14  1  0  0  0  0
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 31 32  1  0  0  0  0
M  END

     RDKit          3D

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   -0.6664    0.3747    0.8188 C   0  0  2  0  0  0  0  0  0  0  0  0
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M  END


  Mrv1652309062221082D          

 32 33  0  0  0  0            999 V2000
   -1.8091   -2.1560    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
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   -0.7485   -3.4200    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
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    4.2868   -1.6500    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.5724   -0.4125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
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M  END
> <DATABASE_ID>
NP0236280

> <DATABASE_NAME>
NP-MRD

> <SMILES>
CCC(C)C=C(C)C=CC(=O)OC1C=CC2=CC(=O)C(CC2(C)C1C)(OC)C(=C)C=NO

> <INCHI_IDENTIFIER>
InChI=1S/C26H35NO5/c1-8-17(2)13-18(3)9-12-24(29)32-22-11-10-21-14-23(28)26(31-7,19(4)15-27-30)16-25(21,6)20(22)5/h9-15,17,20,22,30H,4,8,16H2,1-3,5-7H3

> <INCHI_KEY>
HGOCAVZPSXRMSN-UHFFFAOYSA-N

> <FORMULA>
C26H35NO5

> <MOLECULAR_WEIGHT>
441.568

> <EXACT_MASS>
441.251523231

> <JCHEM_ACCEPTOR_COUNT>
5

> <JCHEM_ATOM_COUNT>
67

> <JCHEM_AVERAGE_POLARIZABILITY>
49.652774535573116

> <JCHEM_BIOAVAILABILITY>
1

> <JCHEM_DONOR_COUNT>
1

> <JCHEM_FORMAL_CHARGE>
0

> <JCHEM_GHOSE_FILTER>
1

> <JCHEM_IUPAC>
7-[3-(hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-1,2,6,7,8,8a-hexahydronaphthalen-2-yl 4,6-dimethylocta-2,4-dienoate

> <JCHEM_LOGP>
5.143402631000001

> <JCHEM_MDDR_LIKE_RULE>
0

> <JCHEM_NUMBER_OF_RINGS>
2

> <JCHEM_PHYSIOLOGICAL_CHARGE>
0

> <JCHEM_PKA_STRONGEST_ACIDIC>
10.525085865919264

> <JCHEM_PKA_STRONGEST_BASIC>
2.599192148327599

> <JCHEM_POLAR_SURFACE_AREA>
85.19

> <JCHEM_REFRACTIVITY>
129.24009999999998

> <JCHEM_ROTATABLE_BOND_COUNT>
9

> <JCHEM_RULE_OF_FIVE>
0

> <JCHEM_TRADITIONAL_IUPAC>
7-[3-(hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-2,8-dihydro-1H-naphthalen-2-yl 4,6-dimethylocta-2,4-dienoate

> <JCHEM_VEBER_RULE>
0

$$$$

HEADER    PROTEIN                                 06-SEP-22   NONE
TITLE     NULL                                                        
COMPND    NULL                                                        
SOURCE    NULL                                                        
KEYWDS    NULL                                                        
EXPDTA    NULL                                                        
AUTHOR    Marvin                                                      
REVDAT   1   06-SEP-22         0                                  
HETATM    1  C   UNK     0      -3.377  -4.025   0.000  0.00  0.00           C+0
HETATM    2  C   UNK     0      -1.860  -3.757   0.000  0.00  0.00           C+0
HETATM    3  C   UNK     0      -0.870  -4.937   0.000  0.00  0.00           C+0
HETATM    4  N   UNK     0      -1.397  -6.384   0.000  0.00  0.00           N+0
HETATM    5  O   UNK     0      -0.407  -7.564   0.000  0.00  0.00           O+0
HETATM    6  C   UNK     0      -1.334  -2.310   0.000  0.00  0.00           C+0
HETATM    7  O   UNK     0      -2.850  -2.043   0.000  0.00  0.00           O+0
HETATM    8  C   UNK     0      -3.840  -3.222   0.000  0.00  0.00           C+0
HETATM    9  C   UNK     0       0.000  -3.080   0.000  0.00  0.00           C+0
HETATM   10  C   UNK     0       1.334  -2.310   0.000  0.00  0.00           C+0
HETATM   11  C   UNK     0       1.334  -3.850   0.000  0.00  0.00           C+0
HETATM   12  C   UNK     0       1.334  -0.770   0.000  0.00  0.00           C+0
HETATM   13  C   UNK     0       0.000  -0.000   0.000  0.00  0.00           C+0
HETATM   14  C   UNK     0      -1.334  -0.770   0.000  0.00  0.00           C+0
HETATM   15  O   UNK     0      -2.667   0.000   0.000  0.00  0.00           O+0
HETATM   16  C   UNK     0       2.667  -0.000   0.000  0.00  0.00           C+0
HETATM   17  C   UNK     0       4.001  -0.770   0.000  0.00  0.00           C+0
HETATM   18  C   UNK     0       4.001  -2.310   0.000  0.00  0.00           C+0
HETATM   19  O   UNK     0       5.335  -3.080   0.000  0.00  0.00           O+0
HETATM   20  C   UNK     0       6.668  -2.310   0.000  0.00  0.00           C+0
HETATM   21  O   UNK     0       8.002  -3.080   0.000  0.00  0.00           O+0
HETATM   22  C   UNK     0       6.668  -0.770   0.000  0.00  0.00           C+0
HETATM   23  C   UNK     0       8.002  -0.000   0.000  0.00  0.00           C+0
HETATM   24  C   UNK     0       8.002   1.540   0.000  0.00  0.00           C+0
HETATM   25  C   UNK     0       6.668   2.310   0.000  0.00  0.00           C+0
HETATM   26  C   UNK     0       9.336   2.310   0.000  0.00  0.00           C+0
HETATM   27  C   UNK     0       9.336   3.850   0.000  0.00  0.00           C+0
HETATM   28  C   UNK     0       8.002   4.620   0.000  0.00  0.00           C+0
HETATM   29  C   UNK     0      10.669   4.620   0.000  0.00  0.00           C+0
HETATM   30  C   UNK     0      10.669   6.160   0.000  0.00  0.00           C+0
HETATM   31  C   UNK     0       2.667  -3.080   0.000  0.00  0.00           C+0
HETATM   32  C   UNK     0       2.667  -4.620   0.000  0.00  0.00           C+0
CONECT    1    2                                                            
CONECT    2    1    3    6                                                  
CONECT    3    2    4                                                       
CONECT    4    3    5                                                       
CONECT    5    4                                                            
CONECT    6    2    7    9   14                                             
CONECT    7    6    8                                                       
CONECT    8    7                                                            
CONECT    9    6   10                                                       
CONECT   10    9   11   12   31                                             
CONECT   11   10                                                            
CONECT   12   10   13   16                                                  
CONECT   13   12   14                                                       
CONECT   14   13    6   15                                                  
CONECT   15   14                                                            
CONECT   16   12   17                                                       
CONECT   17   16   18                                                       
CONECT   18   17   19   31                                                  
CONECT   19   18   20                                                       
CONECT   20   19   21   22                                                  
CONECT   21   20                                                            
CONECT   22   20   23                                                       
CONECT   23   22   24                                                       
CONECT   24   23   25   26                                                  
CONECT   25   24                                                            
CONECT   26   24   27                                                       
CONECT   27   26   28   29                                                  
CONECT   28   27                                                            
CONECT   29   27   30                                                       
CONECT   30   29                                                            
CONECT   31   18   10   32                                                  
CONECT   32   31                                                            
MASTER        0    0    0    0    0    0    0    0   32    0   66    0
END

View in JSmol

Synonyms

Value	Source
7-[3-(Hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-1,2,6,7,8,8a-hexahydronaphthalen-2-yl 4,6-dimethylocta-2,4-dienoic acid	Generator

Chemical Formula

C₂₆H₃₅NO₅

Average Mass

441.5680 Da

Monoisotopic Mass

441.25152 Da

IUPAC Name

7-[3-(hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-1,2,6,7,8,8a-hexahydronaphthalen-2-yl 4,6-dimethylocta-2,4-dienoate

Traditional Name

7-[3-(hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-2,8-dihydro-1H-naphthalen-2-yl 4,6-dimethylocta-2,4-dienoate

CAS Registry Number

Not Available

SMILES

CCC(C)C=C(C)C=CC(=O)OC1C=CC2=CC(=O)C(CC2(C)C1C)(OC)C(=C)C=NO

InChI Identifier

InChI=1S/C26H35NO5/c1-8-17(2)13-18(3)9-12-24(29)32-22-11-10-21-14-23(28)26(31-7,19(4)15-27-30)16-25(21,6)20(22)5/h9-15,17,20,22,30H,4,8,16H2,1-3,5-7H3

InChI Key

HGOCAVZPSXRMSN-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
Curvularia lunata	LOTUS Database	35616633

Chemical Taxonomy

Description

Belongs to the class of organic compounds known as eremophilane, 8,9-secoeremophilane and furoeremophilane sesquiterpenoids. These are sesquiterpenoids with a structure based either on the eremophilane skeleton, its 8,9-seco derivative, or the furoeremophilane skeleton. Eremophilanes have been shown to be derived from eudesmanes by migration of the methyl group at C-10 to C-5.

Kingdom

Organic compounds

Super Class

Lipids and lipid-like molecules

Class

Prenol lipids

Sub Class

Sesquiterpenoids

Direct Parent

Eremophilane, 8,9-secoeremophilane and furoeremophilane sesquiterpenoids

Alternative Parents

Substituents

Eremophilane sesquiterpenoid
Cyclohexenone
Fatty acid ester
Fatty acyl
Alpha,beta-unsaturated carboxylic ester
Enoate ester
Cyclic ketone
Aldoxime
Ketone
Carboxylic acid ester
Oxime
Monocarboxylic acid or derivatives
Ether
Dialkyl ether
Carboxylic acid derivative
Organic nitrogen compound
Organic oxygen compound
Organopnictogen compound
Organic oxide
Hydrocarbon derivative
Organooxygen compound
Organonitrogen compound
Carbonyl group
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	5.14	ChemAxon
pKa (Strongest Acidic)	10.53	ChemAxon
pKa (Strongest Basic)	2.6	ChemAxon
Physiological Charge	0	ChemAxon
Hydrogen Acceptor Count	5	ChemAxon
Hydrogen Donor Count	1	ChemAxon
Polar Surface Area	85.19 Å²	ChemAxon
Rotatable Bond Count	9	ChemAxon
Refractivity	129.24 m³·mol⁻¹	ChemAxon
Polarizability	49.65 Å³	ChemAxon
Number of Rings	2	ChemAxon
Bioavailability	Yes	ChemAxon
Rule of Five	No	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

162815668

PDB ID

Not Available

ChEBI ID

Not Available

Good Scents ID

Not Available

References

General References

LOTUS database [Link]

Showing NP-Card for 7-[3-(hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-2,8-dihydro-1h-naphthalen-2-yl 4,6-dimethylocta-2,4-dienoate (NP0236280)

MOL for NP0236280 (7-[3-(hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-2,8-dihydro-1h-naphthalen-2-yl 4,6-dimethylocta-2,4-dienoate)

3D MOL for NP0236280 (7-[3-(hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-2,8-dihydro-1h-naphthalen-2-yl 4,6-dimethylocta-2,4-dienoate)

3D SDF for NP0236280 (7-[3-(hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-2,8-dihydro-1h-naphthalen-2-yl 4,6-dimethylocta-2,4-dienoate)

3D-SDF for NP0236280 (7-[3-(hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-2,8-dihydro-1h-naphthalen-2-yl 4,6-dimethylocta-2,4-dienoate)

PDB for NP0236280 (7-[3-(hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-2,8-dihydro-1h-naphthalen-2-yl 4,6-dimethylocta-2,4-dienoate)

3D PDB for NP0236280 (7-[3-(hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-2,8-dihydro-1h-naphthalen-2-yl 4,6-dimethylocta-2,4-dienoate)

SMILES for NP0236280 (7-[3-(hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-2,8-dihydro-1h-naphthalen-2-yl 4,6-dimethylocta-2,4-dienoate)

INCHI for NP0236280 (7-[3-(hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-2,8-dihydro-1h-naphthalen-2-yl 4,6-dimethylocta-2,4-dienoate)

Structure for NP0236280 (7-[3-(hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-2,8-dihydro-1h-naphthalen-2-yl 4,6-dimethylocta-2,4-dienoate)

3D Structure for NP0236280 (7-[3-(hydroxyimino)prop-1-en-2-yl]-7-methoxy-1,8a-dimethyl-6-oxo-2,8-dihydro-1h-naphthalen-2-yl 4,6-dimethylocta-2,4-dienoate)