NP-MRD: Showing NP-Card for (4s,4ar,5r,6r,8ar)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4h,5h,6h,7h,8h,8ah-naphtho[2,3-b]furan-4-yl (2z)-2-methylbut-2-enoate (NP0321825)

Jump To Section:

Identification Spectra BioTaxonomy ChemoTaxonomy Physical properties Links References XML

Record Information

Version

2.0

Created at

2022-09-12 00:14:33 UTC

Updated at

2022-09-12 00:14:34 UTC

NP-MRD ID

NP0321825

Secondary Accession Numbers

None

Natural Product Identification

Common Name

(4s,4ar,5r,6r,8ar)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4h,5h,6h,7h,8h,8ah-naphtho[2,3-b]furan-4-yl (2z)-2-methylbut-2-enoate

Description

(4S,4aR,5R,6R,8aR)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4H,4aH,5H,6H,7H,8H,8aH,9H-naphtho[2,3-b]furan-4-yl (2Z)-2-methylbut-2-enoate 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. (4s,4ar,5r,6r,8ar)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4h,5h,6h,7h,8h,8ah-naphtho[2,3-b]furan-4-yl (2z)-2-methylbut-2-enoate is found in Telanthophora grandifolia. Based on a literature review very few articles have been published on (4S,4aR,5R,6R,8aR)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4H,4aH,5H,6H,7H,8H,8aH,9H-naphtho[2,3-b]furan-4-yl (2Z)-2-methylbut-2-enoate.

Structure

MOL SDF PDB SMILES InChI


  Mrv1652309122202142D          

 28 30  0  0  1  0            999 V2000
    4.2868    3.3000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.5724    3.7125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.8579    3.3000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.1434    3.7125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.8579    2.4750    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.5724    2.0625    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.1434    2.0625    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.1434    1.2375    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    2.8579    0.8250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.6425    1.0799    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.8974    1.8646    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.1274    0.4125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.6425   -0.2549    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.8579    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 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.4289    0.0000    0.0000 C   0  0  2  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
    0.0000    0.8250    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
   -0.7145    1.2375    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -1.4289    0.8250    0.0000 C   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    1.2375    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.7145    1.2375    0.0000 C   0  0  2  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
    1.4289    0.8250    0.0000 C   0  0  1  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  2  1  0  0  0  0
  2  3  2  0  0  0  0
  3  4  1  0  0  0  0
  3  5  1  0  0  0  0
  5  6  2  0  0  0  0
  5  7  1  0  0  0  0
  8  7  1  6  0  0  0
  8  9  1  0  0  0  0
  9 10  1  0  0  0  0
 10 11  1  0  0  0  0
 10 12  2  0  0  0  0
 12 13  1  0  0  0  0
 13 14  1  0  0  0  0
  9 14  2  0  0  0  0
 14 15  1  0  0  0  0
 15 16  2  0  0  0  0
 17 15  1  6  0  0  0
 17 18  1  0  0  0  0
 18 19  1  0  0  0  0
 19 20  1  0  0  0  0
 20 21  1  1  0  0  0
 21 22  1  0  0  0  0
 22 23  1  0  0  0  0
 22 24  2  0  0  0  0
 20 25  1  0  0  0  0
 25 26  1  6  0  0  0
 25 27  1  0  0  0  0
  8 27  1  0  0  0  0
 17 27  1  0  0  0  0
 27 28  1  6  0  0  0
M  END


  Mrv1652309122202142D          

 28 30  0  0  1  0            999 V2000
    4.2868    3.3000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.5724    3.7125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.8579    3.3000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.1434    3.7125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.8579    2.4750    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.5724    2.0625    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.1434    2.0625    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.1434    1.2375    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    2.8579    0.8250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.6425    1.0799    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.8974    1.8646    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.1274    0.4125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.6425   -0.2549    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.8579    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 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.4289    0.0000    0.0000 C   0  0  2  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
    0.0000    0.8250    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
   -0.7145    1.2375    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -1.4289    0.8250    0.0000 C   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    1.2375    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.7145    1.2375    0.0000 C   0  0  2  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
    1.4289    0.8250    0.0000 C   0  0  1  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  2  1  0  0  0  0
  2  3  2  0  0  0  0
  3  4  1  0  0  0  0
  3  5  1  0  0  0  0
  5  6  2  0  0  0  0
  5  7  1  0  0  0  0
  8  7  1  6  0  0  0
  8  9  1  0  0  0  0
  9 10  1  0  0  0  0
 10 11  1  0  0  0  0
 10 12  2  0  0  0  0
 12 13  1  0  0  0  0
 13 14  1  0  0  0  0
  9 14  2  0  0  0  0
 14 15  1  0  0  0  0
 15 16  2  0  0  0  0
 17 15  1  6  0  0  0
 17 18  1  0  0  0  0
 18 19  1  0  0  0  0
 19 20  1  0  0  0  0
 20 21  1  1  0  0  0
 21 22  1  0  0  0  0
 22 23  1  0  0  0  0
 22 24  2  0  0  0  0
 20 25  1  0  0  0  0
 25 26  1  6  0  0  0
 25 27  1  0  0  0  0
  8 27  1  0  0  0  0
 17 27  1  0  0  0  0
 27 28  1  6  0  0  0
M  END
> <DATABASE_ID>
NP0321825

> <DATABASE_NAME>
NP-MRD

> <SMILES>
C\C=C(\C)C(=O)O[C@@H]1C2=C(OC=C2C)C(=O)[C@@H]2CC[C@@H](OC(C)=O)[C@H](C)[C@@]12C

> <INCHI_IDENTIFIER>
InChI=1S/C22H28O6/c1-7-11(2)21(25)28-20-17-12(3)10-26-19(17)18(24)15-8-9-16(27-14(5)23)13(4)22(15,20)6/h7,10,13,15-16,20H,8-9H2,1-6H3/b11-7-/t13-,15-,16+,20+,22+/m0/s1

> <INCHI_KEY>
ZBEIDAHTEHJVBJ-HMAFTSSZSA-N

> <FORMULA>
C22H28O6

> <MOLECULAR_WEIGHT>
388.46

> <EXACT_MASS>
388.188588622

> <JCHEM_ACCEPTOR_COUNT>
3

> <JCHEM_ATOM_COUNT>
56

> <JCHEM_AVERAGE_POLARIZABILITY>
41.68294294157579

> <JCHEM_BIOAVAILABILITY>
1

> <JCHEM_DONOR_COUNT>
0

> <JCHEM_FORMAL_CHARGE>
0

> <JCHEM_GHOSE_FILTER>
1

> <JCHEM_IUPAC>
(4S,4aR,5R,6R,8aR)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4H,4aH,5H,6H,7H,8H,8aH,9H-naphtho[2,3-b]furan-4-yl (2Z)-2-methylbut-2-enoate

> <JCHEM_LOGP>
3.9676699610000012

> <JCHEM_MDDR_LIKE_RULE>
0

> <JCHEM_NUMBER_OF_RINGS>
3

> <JCHEM_PHYSIOLOGICAL_CHARGE>
0

> <JCHEM_PKA_STRONGEST_ACIDIC>
13.910587126683062

> <JCHEM_PKA_STRONGEST_BASIC>
-2.9468021025008837

> <JCHEM_POLAR_SURFACE_AREA>
82.81

> <JCHEM_REFRACTIVITY>
103.24069999999999

> <JCHEM_ROTATABLE_BOND_COUNT>
5

> <JCHEM_RULE_OF_FIVE>
1

> <JCHEM_TRADITIONAL_IUPAC>
(4S,4aR,5R,6R,8aR)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4H,5H,6H,7H,8H,8aH-naphtho[2,3-b]furan-4-yl (2Z)-2-methylbut-2-enoate

> <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       8.002   6.160   0.000  0.00  0.00           C+0
HETATM    2  C   UNK     0       6.668   6.930   0.000  0.00  0.00           C+0
HETATM    3  C   UNK     0       5.335   6.160   0.000  0.00  0.00           C+0
HETATM    4  C   UNK     0       4.001   6.930   0.000  0.00  0.00           C+0
HETATM    5  C   UNK     0       5.335   4.620   0.000  0.00  0.00           C+0
HETATM    6  O   UNK     0       6.668   3.850   0.000  0.00  0.00           O+0
HETATM    7  O   UNK     0       4.001   3.850   0.000  0.00  0.00           O+0
HETATM    8  C   UNK     0       4.001   2.310   0.000  0.00  0.00           C+0
HETATM    9  C   UNK     0       5.335   1.540   0.000  0.00  0.00           C+0
HETATM   10  C   UNK     0       6.799   2.016   0.000  0.00  0.00           C+0
HETATM   11  C   UNK     0       7.275   3.481   0.000  0.00  0.00           C+0
HETATM   12  C   UNK     0       7.705   0.770   0.000  0.00  0.00           C+0
HETATM   13  O   UNK     0       6.799  -0.476   0.000  0.00  0.00           O+0
HETATM   14  C   UNK     0       5.335   0.000   0.000  0.00  0.00           C+0
HETATM   15  C   UNK     0       4.001  -0.770   0.000  0.00  0.00           C+0
HETATM   16  O   UNK     0       4.001  -2.310   0.000  0.00  0.00           O+0
HETATM   17  C   UNK     0       2.667   0.000   0.000  0.00  0.00           C+0
HETATM   18  C   UNK     0       1.334  -0.770   0.000  0.00  0.00           C+0
HETATM   19  C   UNK     0       0.000   0.000   0.000  0.00  0.00           C+0
HETATM   20  C   UNK     0       0.000   1.540   0.000  0.00  0.00           C+0
HETATM   21  O   UNK     0      -1.334   2.310   0.000  0.00  0.00           O+0
HETATM   22  C   UNK     0      -2.667   1.540   0.000  0.00  0.00           C+0
HETATM   23  C   UNK     0      -2.667   0.000   0.000  0.00  0.00           C+0
HETATM   24  O   UNK     0      -4.001   2.310   0.000  0.00  0.00           O+0
HETATM   25  C   UNK     0       1.334   2.310   0.000  0.00  0.00           C+0
HETATM   26  C   UNK     0       1.334   3.850   0.000  0.00  0.00           C+0
HETATM   27  C   UNK     0       2.667   1.540   0.000  0.00  0.00           C+0
HETATM   28  C   UNK     0       2.667   3.080   0.000  0.00  0.00           C+0
CONECT    1    2                                                            
CONECT    2    1    3                                                       
CONECT    3    2    4    5                                                  
CONECT    4    3                                                            
CONECT    5    3    6    7                                                  
CONECT    6    5                                                            
CONECT    7    5    8                                                       
CONECT    8    7    9   27                                                  
CONECT    9    8   10   14                                                  
CONECT   10    9   11   12                                                  
CONECT   11   10                                                            
CONECT   12   10   13                                                       
CONECT   13   12   14                                                       
CONECT   14   13    9   15                                                  
CONECT   15   14   16   17                                                  
CONECT   16   15                                                            
CONECT   17   15   18   27                                                  
CONECT   18   17   19                                                       
CONECT   19   18   20                                                       
CONECT   20   19   21   25                                                  
CONECT   21   20   22                                                       
CONECT   22   21   23   24                                                  
CONECT   23   22                                                            
CONECT   24   22                                                            
CONECT   25   20   26   27                                                  
CONECT   26   25                                                            
CONECT   27   25    8   17   28                                             
CONECT   28   27                                                            
MASTER        0    0    0    0    0    0    0    0   28    0   60    0
END

View in JSmol

Synonyms

Value	Source
(4S,4AR,5R,6R,8ar)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4H,4ah,5H,6H,7H,8H,8ah,9H-naphtho[2,3-b]furan-4-yl (2Z)-2-methylbut-2-enoic acid	Generator

Chemical Formula

C₂₂H₂₈O₆

Average Mass

388.4600 Da

Monoisotopic Mass

388.18859 Da

IUPAC Name

(4S,4aR,5R,6R,8aR)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4H,4aH,5H,6H,7H,8H,8aH,9H-naphtho[2,3-b]furan-4-yl (2Z)-2-methylbut-2-enoate

Traditional Name

(4S,4aR,5R,6R,8aR)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4H,5H,6H,7H,8H,8aH-naphtho[2,3-b]furan-4-yl (2Z)-2-methylbut-2-enoate

CAS Registry Number

Not Available

SMILES

C\C=C(\C)C(=O)O[C@@H]1C2=C(OC=C2C)C(=O)[C@@H]2CC[C@@H](OC(C)=O)[C@H](C)[C@@]12C

InChI Identifier

InChI=1S/C22H28O6/c1-7-11(2)21(25)28-20-17-12(3)10-26-19(17)18(24)15-8-9-16(27-14(5)23)13(4)22(15,20)6/h7,10,13,15-16,20H,8-9H2,1-6H3/b11-7-/t13-,15-,16+,20+,22+/m0/s1

InChI Key

ZBEIDAHTEHJVBJ-HMAFTSSZSA-N

Experimental Spectra

Not Available

Predicted Spectra

Not Available

Chemical Shift Submissions

Not Available

Species

Species of Origin

Species Name	Source	Reference
Telanthophora grandifolia	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

Furoeremophilane sesquiterpenoid
Naphthofuran
Benzofuran
Aryl ketone
Aryl alkyl ketone
Fatty acid ester
Dicarboxylic acid or derivatives
Fatty acyl
Furan
Heteroaromatic compound
Enoate ester
Alpha,beta-unsaturated carboxylic ester
Ketone
Carboxylic acid ester
Carboxylic acid derivative
Oxacycle
Organoheterocyclic compound
Organooxygen compound
Organic oxygen compound
Hydrocarbon derivative
Organic oxide
Carbonyl group
Aromatic heteropolycyclic compound

Molecular Framework

Aromatic 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	3.97	ChemAxon
pKa (Strongest Acidic)	13.91	ChemAxon
pKa (Strongest Basic)	-2.9	ChemAxon
Physiological Charge	0	ChemAxon
Hydrogen Acceptor Count	3	ChemAxon
Hydrogen Donor Count	0	ChemAxon
Polar Surface Area	82.81 Å²	ChemAxon
Rotatable Bond Count	5	ChemAxon
Refractivity	103.24 m³·mol⁻¹	ChemAxon
Polarizability	41.68 Å³	ChemAxon
Number of Rings	3	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

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

163191376

PDB ID

Not Available

ChEBI ID

Not Available

Good Scents ID

Not Available

References

General References

LOTUS database [Link]

Showing NP-Card for (4s,4ar,5r,6r,8ar)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4h,5h,6h,7h,8h,8ah-naphtho[2,3-b]furan-4-yl (2z)-2-methylbut-2-enoate (NP0321825)

MOL for NP0321825 ((4s,4ar,5r,6r,8ar)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4h,5h,6h,7h,8h,8ah-naphtho[2,3-b]furan-4-yl (2z)-2-methylbut-2-enoate)

3D MOL for NP0321825 ((4s,4ar,5r,6r,8ar)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4h,5h,6h,7h,8h,8ah-naphtho[2,3-b]furan-4-yl (2z)-2-methylbut-2-enoate)

3D SDF for NP0321825 ((4s,4ar,5r,6r,8ar)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4h,5h,6h,7h,8h,8ah-naphtho[2,3-b]furan-4-yl (2z)-2-methylbut-2-enoate)

3D-SDF for NP0321825 ((4s,4ar,5r,6r,8ar)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4h,5h,6h,7h,8h,8ah-naphtho[2,3-b]furan-4-yl (2z)-2-methylbut-2-enoate)

PDB for NP0321825 ((4s,4ar,5r,6r,8ar)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4h,5h,6h,7h,8h,8ah-naphtho[2,3-b]furan-4-yl (2z)-2-methylbut-2-enoate)

3D PDB for NP0321825 ((4s,4ar,5r,6r,8ar)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4h,5h,6h,7h,8h,8ah-naphtho[2,3-b]furan-4-yl (2z)-2-methylbut-2-enoate)

SMILES for NP0321825 ((4s,4ar,5r,6r,8ar)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4h,5h,6h,7h,8h,8ah-naphtho[2,3-b]furan-4-yl (2z)-2-methylbut-2-enoate)

INCHI for NP0321825 ((4s,4ar,5r,6r,8ar)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4h,5h,6h,7h,8h,8ah-naphtho[2,3-b]furan-4-yl (2z)-2-methylbut-2-enoate)

Structure for NP0321825 ((4s,4ar,5r,6r,8ar)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4h,5h,6h,7h,8h,8ah-naphtho[2,3-b]furan-4-yl (2z)-2-methylbut-2-enoate)

3D Structure for NP0321825 ((4s,4ar,5r,6r,8ar)-6-(acetyloxy)-3,4a,5-trimethyl-9-oxo-4h,5h,6h,7h,8h,8ah-naphtho[2,3-b]furan-4-yl (2z)-2-methylbut-2-enoate)