NP-MRD: Showing NP-Card for 6-hydroxy-3,5a,9-trimethyl-3h,3ah,4h,5h,6h,7h,9ah,9bh-naphtho[1,2-b]furan-2-one (NP0216076)

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Record Information

Version

2.0

Created at

2022-09-05 15:54:21 UTC

Updated at

2022-09-05 15:54:21 UTC

NP-MRD ID

NP0216076

Secondary Accession Numbers

None

Natural Product Identification

Common Name

6-hydroxy-3,5a,9-trimethyl-3h,3ah,4h,5h,6h,7h,9ah,9bh-naphtho[1,2-b]furan-2-one

Description

MEGxp0_001465 belongs to the class of organic compounds known as eudesmanolides, secoeudesmanolides, and derivatives. These are terpenoids with a structure based on the eudesmanolide (a 3,5a,9-trimethyl-naphtho[1,2-b]furan-2-one derivative) or secoeudesmanolide (a 3,6-dimethyl-5-(pentan-2-yl)-1-benzofuran-2-one derivative) skeleton. 6-hydroxy-3,5a,9-trimethyl-3h,3ah,4h,5h,6h,7h,9ah,9bh-naphtho[1,2-b]furan-2-one is found in Achillea collina, Artemisia barrelieri, Artemisia canariensis, Artemisia fragrans, Artemisia herba-alba, Inula helenium, Lactuca sativa, Lactuca tatarica and Magnolia kachirachirai. MEGxp0_001465 is an extremely weak basic (essentially neutral) compound (based on its pKa).

Structure

MOL 3D MOL SDF PDB SMILES InChI

     RDKit          3D

 40 42  0  0  0  0  0  0  0  0999 V2000
   -1.5272    2.8277    1.1680 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.4874    1.3700    0.8664 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4136    0.6094    1.4093 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.3755   -0.8264    1.1136 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.9224   -1.2291   -0.2255 C   0  0  1  0  0  0  0  0  0  0  0  0
   -3.0678   -1.4684   -1.0168 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.9746   -0.2834   -0.9175 C   0  0  2  0  0  0  0  0  0  0  0  0
   -1.8490    0.4497   -1.9468 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.0512   -1.0808   -1.6053 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4461   -1.0629   -1.0902 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.8174    0.1967   -0.3708 C   0  0  2  0  0  0  0  0  0  0  0  0
    3.0431    0.1598    0.4242 C   0  0  2  0  0  0  0  0  0  0  0  0
    3.7273   -1.1687    0.5088 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.6476    0.7009    1.7484 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.4207    0.7359    2.7405 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.3302    1.1228    1.6351 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.7304    0.2876    0.7172 C   0  0  1  0  0  0  0  0  0  0  0  0
   -0.4511    0.8020   -0.0101 C   0  0  2  0  0  0  0  0  0  0  0  0
   -0.5625    3.3262    0.9983 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.2886    3.3443    0.5248 H   0  0  0  0  0  0  0  0  0  0  0  0
   -1.8242    2.9228    2.2415 H   0  0  0  0  0  0  0  0  0  0  0  0
   -3.1881    1.0480    2.0638 H   0  0  0  0  0  0  0  0  0  0  0  0
   -1.7127   -1.2978    1.8988 H   0  0  0  0  0  0  0  0  0  0  0  0
   -3.4084   -1.2285    1.3377 H   0  0  0  0  0  0  0  0  0  0  0  0
   -1.4527   -2.2459   -0.1399 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.8892   -2.1694   -1.6901 H   0  0  0  0  0  0  0  0  0  0  0  0
   -1.3005    1.2774   -2.4074 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.7216    0.8621   -1.3731 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.2710   -0.2622   -2.6883 H   0  0  0  0  0  0  0  0  0  0  0  0
    0.1039   -0.7605   -2.6905 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.2362   -2.1734   -1.6956 H   0  0  0  0  0  0  0  0  0  0  0  0
    2.1953   -1.1771   -1.9268 H   0  0  0  0  0  0  0  0  0  0  0  0
    1.6624   -1.9119   -0.4057 H   0  0  0  0  0  0  0  0  0  0  0  0
    1.7494    1.0453   -1.0614 H   0  0  0  0  0  0  0  0  0  0  0  0
    3.7835    0.8842    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
    4.8121   -1.0344    0.7135 H   0  0  0  0  0  0  0  0  0  0  0  0
    3.2362   -1.8817    1.1823 H   0  0  0  0  0  0  0  0  0  0  0  0
    3.6841   -1.6289   -0.5172 H   0  0  0  0  0  0  0  0  0  0  0  0
    0.6058   -0.7141    1.1602 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.1225    1.6327   -0.6734 H   0  0  0  0  0  0  0  0  0  0  0  0
 13 12  1  0
 12 11  1  0
 11 10  1  0
 10  9  1  0
  9  7  1  0
  7  8  1  6
  7  5  1  0
  5  6  1  0
  5  4  1  0
  4  3  1  0
  3  2  2  0
  2  1  1  0
  2 18  1  0
 18 17  1  0
 17 16  1  0
 16 14  1  0
 14 15  2  0
 14 12  1  0
 17 11  1  0
 18  7  1  0
 13 36  1  0
 13 37  1  0
 13 38  1  0
 12 35  1  6
 11 34  1  6
 10 32  1  0
 10 33  1  0
  9 30  1  0
  9 31  1  0
  8 27  1  0
  8 28  1  0
  8 29  1  0
  5 25  1  1
  6 26  1  0
  4 23  1  0
  4 24  1  0
  3 22  1  0
  1 19  1  0
  1 20  1  0
  1 21  1  0
 18 40  1  6
 17 39  1  1
M  END


  Mrv1533004161521362D          

 18 20  0  0  0  0            999 V2000
    1.5452    0.1607    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.1752   -0.3719    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.9765   -0.1753    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.3664    0.5517    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.1910    0.5775    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.6256   -0.1238    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.0156    0.6032    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.4502   -0.0980    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.8402    0.6290    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    5.8849   -0.7992    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.4949   -1.5262    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.6703   -1.5520    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.2803   -2.2790    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.2357   -0.8508    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.4111   -0.8765    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.8784   -1.5066    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.1147   -1.1947    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4134   -1.6293    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
  3  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
  6  8  1  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  2  0  0  0  0
 12 13  1  0  0  0  0
 12 14  1  0  0  0  0
  6 14  1  0  0  0  0
 14 15  1  0  0  0  0
  3 15  1  0  0  0  0
 15 16  1  0  0  0  0
 16 17  1  0  0  0  0
  2 17  1  0  0  0  0
 17 18  2  0  0  0  0
M  END
> <DATABASE_ID>
NP0216076

> <DATABASE_NAME>
NP-MRD

> <SMILES>
CC1C2CCC3(C)C(O)CC=C(C)C3C2OC1=O

> <INCHI_IDENTIFIER>
InChI=1S/C15H22O3/c1-8-4-5-11(16)15(3)7-6-10-9(2)14(17)18-13(10)12(8)15/h4,9-13,16H,5-7H2,1-3H3

> <INCHI_KEY>
DGIMMEWTLSCNGO-UHFFFAOYSA-N

> <FORMULA>
C15H22O3

> <MOLECULAR_WEIGHT>
250.338

> <EXACT_MASS>
250.156894568

> <JCHEM_ACCEPTOR_COUNT>
2

> <JCHEM_ATOM_COUNT>
40

> <JCHEM_AVERAGE_POLARIZABILITY>
27.715632098854755

> <JCHEM_BIOAVAILABILITY>
1

> <JCHEM_DONOR_COUNT>
1

> <JCHEM_FORMAL_CHARGE>
0

> <JCHEM_GHOSE_FILTER>
1

> <JCHEM_IUPAC>
6-hydroxy-3,5a,9-trimethyl-2H,3H,3aH,4H,5H,5aH,6H,7H,9aH,9bH-naphtho[1,2-b]furan-2-one

> <ALOGPS_LOGP>
2.35

> <JCHEM_LOGP>
2.0055296103333333

> <ALOGPS_LOGS>
-2.50

> <JCHEM_MDDR_LIKE_RULE>
0

> <JCHEM_NUMBER_OF_RINGS>
3

> <JCHEM_PHYSIOLOGICAL_CHARGE>
0

> <JCHEM_PKA_STRONGEST_ACIDIC>
14.62584283178823

> <JCHEM_PKA_STRONGEST_BASIC>
-2.962456345375827

> <JCHEM_POLAR_SURFACE_AREA>
46.53

> <JCHEM_REFRACTIVITY>
68.90499999999999

> <JCHEM_ROTATABLE_BOND_COUNT>
0

> <JCHEM_RULE_OF_FIVE>
1

> <ALOGPS_SOLUBILITY>
7.97e-01 g/l

> <JCHEM_TRADITIONAL_IUPAC>
6-hydroxy-3,5a,9-trimethyl-3H,3aH,4H,5H,6H,7H,9aH,9bH-naphtho[1,2-b]furan-2-one

> <JCHEM_VEBER_RULE>
0

$$$$

HEADER    PROTEIN                                 16-APR-15   NONE
TITLE     NULL                                                        
COMPND    NULL                                                        
SOURCE    NULL                                                        
KEYWDS    NULL                                                        
EXPDTA    NULL                                                        
AUTHOR    Marvin                                                      
REVDAT   1   16-APR-15         0                                  
HETATM    1  C   UNK     0       2.884   0.300   0.000  0.00  0.00           C+0
HETATM    2  C   UNK     0       4.060  -0.694   0.000  0.00  0.00           C+0
HETATM    3  C   UNK     0       5.556  -0.327   0.000  0.00  0.00           C+0
HETATM    4  C   UNK     0       6.284   1.030   0.000  0.00  0.00           C+0
HETATM    5  C   UNK     0       7.823   1.078   0.000  0.00  0.00           C+0
HETATM    6  C   UNK     0       8.635  -0.231   0.000  0.00  0.00           C+0
HETATM    7  C   UNK     0       9.363   1.126   0.000  0.00  0.00           C+0
HETATM    8  C   UNK     0      10.174  -0.183   0.000  0.00  0.00           C+0
HETATM    9  O   UNK     0      10.902   1.174   0.000  0.00  0.00           O+0
HETATM   10  C   UNK     0      10.985  -1.492   0.000  0.00  0.00           C+0
HETATM   11  C   UNK     0      10.257  -2.849   0.000  0.00  0.00           C+0
HETATM   12  C   UNK     0       8.718  -2.897   0.000  0.00  0.00           C+0
HETATM   13  C   UNK     0       7.990  -4.254   0.000  0.00  0.00           C+0
HETATM   14  C   UNK     0       7.907  -1.588   0.000  0.00  0.00           C+0
HETATM   15  C   UNK     0       6.367  -1.636   0.000  0.00  0.00           C+0
HETATM   16  O   UNK     0       5.373  -2.812   0.000  0.00  0.00           O+0
HETATM   17  C   UNK     0       3.947  -2.230   0.000  0.00  0.00           C+0
HETATM   18  O   UNK     0       2.638  -3.041   0.000  0.00  0.00           O+0
CONECT    1    2                                                            
CONECT    2    1    3   17                                                  
CONECT    3    2    4   15                                                  
CONECT    4    3    5                                                       
CONECT    5    4    6                                                       
CONECT    6    5    7    8   14                                             
CONECT    7    6                                                            
CONECT    8    6    9   10                                                  
CONECT    9    8                                                            
CONECT   10    8   11                                                       
CONECT   11   10   12                                                       
CONECT   12   11   13   14                                                  
CONECT   13   12                                                            
CONECT   14   12    6   15                                                  
CONECT   15   14    3   16                                                  
CONECT   16   15   17                                                       
CONECT   17   16    2   18                                                  
CONECT   18   17                                                            
MASTER        0    0    0    0    0    0    0    0   18    0   40    0
END

View in JSmol

Synonyms

Not Available

Chemical Formula

C₁₅H₂₂O₃

Average Mass

250.3380 Da

Monoisotopic Mass

250.15689 Da

IUPAC Name

6-hydroxy-3,5a,9-trimethyl-2H,3H,3aH,4H,5H,5aH,6H,7H,9aH,9bH-naphtho[1,2-b]furan-2-one

Traditional Name

6-hydroxy-3,5a,9-trimethyl-3H,3aH,4H,5H,6H,7H,9aH,9bH-naphtho[1,2-b]furan-2-one

CAS Registry Number

Not Available

SMILES

CC1C2CCC3(C)C(O)CC=C(C)C3C2OC1=O

InChI Identifier

InChI=1S/C15H22O3/c1-8-4-5-11(16)15(3)7-6-10-9(2)14(17)18-13(10)12(8)15/h4,9-13,16H,5-7H2,1-3H3

InChI Key

DGIMMEWTLSCNGO-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
Achillea collina	LOTUS Database	35616633
Artemisia barrelieri	LOTUS Database	35616633
Artemisia canariensis	LOTUS Database	35616633
Artemisia fragrans	LOTUS Database	35616633
Artemisia herba-alba	LOTUS Database	35616633
Inula helenium	LOTUS Database	35616633
Lactuca sativa	LOTUS Database	35616633
Lactuca tatarica	LOTUS Database	35616633
Magnolia kachirachirai	LOTUS Database	35616633

Chemical Taxonomy

Description

Belongs to the class of organic compounds known as eudesmanolides, secoeudesmanolides, and derivatives. These are terpenoids with a structure based on the eudesmanolide (a 3,5a,9-trimethyl-naphtho[1,2-b]furan-2-one derivative) or secoeudesmanolide (a 3,6-dimethyl-5-(pentan-2-yl)-1-benzofuran-2-one derivative) skeleton.

Kingdom

Organic compounds

Super Class

Lipids and lipid-like molecules

Class

Prenol lipids

Sub Class

Terpene lactones

Direct Parent

Eudesmanolides, secoeudesmanolides, and derivatives

Alternative Parents

Substituents

Eudesmanolide
Sesquiterpenoid
Naphthofuran
Gamma butyrolactone
Oxolane
Secondary alcohol
Lactone
Carboxylic acid ester
Oxacycle
Organoheterocyclic compound
Monocarboxylic acid or derivatives
Carboxylic acid derivative
Organic oxide
Organooxygen compound
Alcohol
Organic oxygen compound
Carbonyl group
Hydrocarbon derivative
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	2.35	ALOGPS
logP	2.01	ChemAxon
logS	-2.5	ALOGPS
pKa (Strongest Acidic)	14.63	ChemAxon
pKa (Strongest Basic)	-3	ChemAxon
Physiological Charge	0	ChemAxon
Hydrogen Acceptor Count	2	ChemAxon
Hydrogen Donor Count	1	ChemAxon
Polar Surface Area	46.53 Å²	ChemAxon
Rotatable Bond Count	0	ChemAxon
Refractivity	68.9 m³·mol⁻¹	ChemAxon
Polarizability	27.72 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

13895712

PDB ID

Not Available

ChEBI ID

Not Available

Good Scents ID

Not Available

References

General References

LOTUS database [Link]

Showing NP-Card for 6-hydroxy-3,5a,9-trimethyl-3h,3ah,4h,5h,6h,7h,9ah,9bh-naphtho[1,2-b]furan-2-one (NP0216076)

MOL for NP0216076 (6-hydroxy-3,5a,9-trimethyl-3h,3ah,4h,5h,6h,7h,9ah,9bh-naphtho[1,2-b]furan-2-one)

3D MOL for NP0216076 (6-hydroxy-3,5a,9-trimethyl-3h,3ah,4h,5h,6h,7h,9ah,9bh-naphtho[1,2-b]furan-2-one)

3D SDF for NP0216076 (6-hydroxy-3,5a,9-trimethyl-3h,3ah,4h,5h,6h,7h,9ah,9bh-naphtho[1,2-b]furan-2-one)

3D-SDF for NP0216076 (6-hydroxy-3,5a,9-trimethyl-3h,3ah,4h,5h,6h,7h,9ah,9bh-naphtho[1,2-b]furan-2-one)

PDB for NP0216076 (6-hydroxy-3,5a,9-trimethyl-3h,3ah,4h,5h,6h,7h,9ah,9bh-naphtho[1,2-b]furan-2-one)

3D PDB for NP0216076 (6-hydroxy-3,5a,9-trimethyl-3h,3ah,4h,5h,6h,7h,9ah,9bh-naphtho[1,2-b]furan-2-one)

SMILES for NP0216076 (6-hydroxy-3,5a,9-trimethyl-3h,3ah,4h,5h,6h,7h,9ah,9bh-naphtho[1,2-b]furan-2-one)

INCHI for NP0216076 (6-hydroxy-3,5a,9-trimethyl-3h,3ah,4h,5h,6h,7h,9ah,9bh-naphtho[1,2-b]furan-2-one)

Structure for NP0216076 (6-hydroxy-3,5a,9-trimethyl-3h,3ah,4h,5h,6h,7h,9ah,9bh-naphtho[1,2-b]furan-2-one)

3D Structure for NP0216076 (6-hydroxy-3,5a,9-trimethyl-3h,3ah,4h,5h,6h,7h,9ah,9bh-naphtho[1,2-b]furan-2-one)