NP-MRD: Showing NP-Card for 4-[2-(4,4-dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2h-furan-3-carboxylic acid (NP0202632)

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Record Information

Version

1.0

Created at

2022-09-04 21:53:13 UTC

Updated at

2022-09-04 21:53:13 UTC

NP-MRD ID

NP0202632

Secondary Accession Numbers

None

Natural Product Identification

Common Name

4-[2-(4,4-dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2h-furan-3-carboxylic acid

Description

4-[2-(4,4-Dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2,5-dihydrofuran-3-carboxylic acid belongs to the class of organic compounds known as terpene lactones. These are prenol lipids containing a lactone ring. 4-[2-(4,4-dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2h-furan-3-carboxylic acid is found in Strobilurus stephanocystis. It was first documented in 2012 (PMID: 36070501). Based on a literature review a significant number of articles have been published on 4-[2-(4,4-dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2,5-dihydrofuran-3-carboxylic acid (PMID: 36070500) (PMID: 36070964) (PMID: 36070963) (PMID: 36070962).

Structure

MOL 3D MOL SDF PDB SMILES InChI

     RDKit          3D

 39 40  0  0  0  0  0  0  0  0999 V2000
    1.0988   -1.4897    1.1937 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.3928   -0.9997   -0.0281 C   0  0  2  0  0  0  0  0  0  0  0  0
    1.0541    0.3026   -0.4935 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.4677    0.0437   -0.8023 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.5044    0.6141   -0.2137 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.5729    1.6053    0.8510 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.5299    2.0585    1.3652 O   0  0  0  0  0  0  0  0  0  0  0  0
    4.8373    2.0257    1.2715 O   0  0  0  0  0  0  0  0  0  0  0  0
    4.7660    0.0539   -0.8426 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.3092   -0.8435   -1.7949 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.9408   -0.9094   -1.8350 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.1617   -1.5837   -2.5408 O   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0664   -0.7884    0.1814 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.7622   -0.9405    1.2850 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.1910   -0.6281    1.0701 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.2368    0.1288   -0.2138 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.2064    1.6254   -0.0268 C   0  0  0  0  0  0  0  0  0  0  0  0
   -4.4075   -0.2336   -1.0890 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.9728   -0.3490   -0.8990 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.5475   -0.6332    1.7480 H   0  0  0  0  0  0  0  0  0  0  0  0
    0.4527   -2.1067    1.8524 H   0  0  0  0  0  0  0  0  0  0  0  0
    1.9602   -2.1248    0.8694 H   0  0  0  0  0  0  0  0  0  0  0  0
    0.4712   -1.7386   -0.8759 H   0  0  0  0  0  0  0  0  0  0  0  0
    0.5337    0.6631   -1.4237 H   0  0  0  0  0  0  0  0  0  0  0  0
    0.8755    1.0840    0.2482 H   0  0  0  0  0  0  0  0  0  0  0  0
    4.9340    3.0038    1.5484 H   0  0  0  0  0  0  0  0  0  0  0  0
    5.2849    0.9433   -1.2718 H   0  0  0  0  0  0  0  0  0  0  0  0
    5.3327   -0.4033   -0.0110 H   0  0  0  0  0  0  0  0  0  0  0  0
   -1.3772   -1.2609    2.2813 H   0  0  0  0  0  0  0  0  0  0  0  0
   -3.8318   -1.5375    1.0732 H   0  0  0  0  0  0  0  0  0  0  0  0
   -3.5312    0.0560    1.8951 H   0  0  0  0  0  0  0  0  0  0  0  0
   -3.0479    2.1138   -0.9992 H   0  0  0  0  0  0  0  0  0  0  0  0
   -4.2019    1.9537    0.3395 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4576    1.9313    0.7313 H   0  0  0  0  0  0  0  0  0  0  0  0
   -4.1629    0.1459   -2.1216 H   0  0  0  0  0  0  0  0  0  0  0  0
   -4.5567   -1.3139   -1.1874 H   0  0  0  0  0  0  0  0  0  0  0  0
   -5.3351    0.3203   -0.8009 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.1720   -1.2483   -1.5376 H   0  0  0  0  0  0  0  0  0  0  0  0
   -1.5107    0.4595   -1.5116 H   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0
  2  3  1  0
  3  4  1  0
  4  5  2  0
  5  9  1  0
  9 10  1  0
 10 11  1  0
 11 12  2  0
  5  6  1  0
  6  8  1  0
  6  7  2  0
  2 13  1  0
 13 14  2  0
 14 15  1  0
 15 16  1  0
 16 17  1  0
 16 18  1  0
 16 19  1  0
 11  4  1  0
 19 13  1  0
  1 20  1  0
  1 21  1  0
  1 22  1  0
  2 23  1  6
  3 24  1  0
  3 25  1  0
  9 27  1  0
  9 28  1  0
  8 26  1  0
 14 29  1  0
 15 30  1  0
 15 31  1  0
 17 32  1  0
 17 33  1  0
 17 34  1  0
 18 35  1  0
 18 36  1  0
 18 37  1  0
 19 38  1  0
 19 39  1  0
M  END


  Mrv1652309042223532D          

 19 20  0  0  0  0            999 V2000
    2.3883   -1.5779    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.6738   -1.1654    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.9593   -1.5779    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.9593   -2.4029    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.2919   -2.8879    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.4927   -2.6329    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.6643   -1.8259    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -1.1058   -3.1849    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.5468   -3.6725    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.3718   -3.6725    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.6268   -2.8879    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.4114   -2.6329    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.6738   -0.3404    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.0064    0.1445    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.2613    0.9291    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.0863    0.9291    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.0001    1.7496    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.8933    1.1006    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.3412    0.1445    0.0000 C   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  2  0  0  0  0
  5  6  1  0  0  0  0
  6  7  2  0  0  0  0
  6  8  1  0  0  0  0
  5  9  1  0  0  0  0
  9 10  1  0  0  0  0
 10 11  1  0  0  0  0
  4 11  1  0  0  0  0
 11 12  2  0  0  0  0
  2 13  1  0  0  0  0
 13 14  2  0  0  0  0
 14 15  1  0  0  0  0
 15 16  1  0  0  0  0
 16 17  1  0  0  0  0
 16 18  1  0  0  0  0
 16 19  1  0  0  0  0
 13 19  1  0  0  0  0
M  END
> <DATABASE_ID>
NP0202632

> <DATABASE_NAME>
NP-MRD

> <SMILES>
CC(CC1=C(COC1=O)C(O)=O)C1=CCC(C)(C)C1

> <INCHI_IDENTIFIER>
InChI=1S/C15H20O4/c1-9(10-4-5-15(2,3)7-10)6-11-12(13(16)17)8-19-14(11)18/h4,9H,5-8H2,1-3H3,(H,16,17)

> <INCHI_KEY>
OZQQHYHARGIDIF-UHFFFAOYSA-N

> <FORMULA>
C15H20O4

> <MOLECULAR_WEIGHT>
264.321

> <EXACT_MASS>
264.136159124

> <JCHEM_ACCEPTOR_COUNT>
3

> <JCHEM_ATOM_COUNT>
39

> <JCHEM_AVERAGE_POLARIZABILITY>
27.701498141411186

> <JCHEM_BIOAVAILABILITY>
1

> <JCHEM_DONOR_COUNT>
1

> <JCHEM_FORMAL_CHARGE>
0

> <JCHEM_GHOSE_FILTER>
1

> <JCHEM_IUPAC>
4-[2-(4,4-dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2,5-dihydrofuran-3-carboxylic acid

> <JCHEM_LOGP>
2.8818622986666664

> <JCHEM_MDDR_LIKE_RULE>
0

> <JCHEM_NUMBER_OF_RINGS>
2

> <JCHEM_PHYSIOLOGICAL_CHARGE>
-1

> <JCHEM_PKA>
13.411045759951445

> <JCHEM_PKA_STRONGEST_ACIDIC>
3.723156142536348

> <JCHEM_PKA_STRONGEST_BASIC>
-6.930762146861733

> <JCHEM_POLAR_SURFACE_AREA>
63.6

> <JCHEM_REFRACTIVITY>
71.7774

> <JCHEM_ROTATABLE_BOND_COUNT>
4

> <JCHEM_RULE_OF_FIVE>
1

> <JCHEM_TRADITIONAL_IUPAC>
4-[2-(4,4-dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2H-furan-3-carboxylic 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       4.458  -2.945   0.000  0.00  0.00           C+0
HETATM    2  C   UNK     0       3.124  -2.175   0.000  0.00  0.00           C+0
HETATM    3  C   UNK     0       1.791  -2.945   0.000  0.00  0.00           C+0
HETATM    4  C   UNK     0       1.791  -4.485   0.000  0.00  0.00           C+0
HETATM    5  C   UNK     0       0.545  -5.391   0.000  0.00  0.00           C+0
HETATM    6  C   UNK     0      -0.920  -4.915   0.000  0.00  0.00           C+0
HETATM    7  O   UNK     0      -1.240  -3.408   0.000  0.00  0.00           O+0
HETATM    8  O   UNK     0      -2.064  -5.945   0.000  0.00  0.00           O+0
HETATM    9  C   UNK     0       1.021  -6.855   0.000  0.00  0.00           C+0
HETATM   10  O   UNK     0       2.561  -6.855   0.000  0.00  0.00           O+0
HETATM   11  C   UNK     0       3.037  -5.391   0.000  0.00  0.00           C+0
HETATM   12  O   UNK     0       4.501  -4.915   0.000  0.00  0.00           O+0
HETATM   13  C   UNK     0       3.124  -0.635   0.000  0.00  0.00           C+0
HETATM   14  C   UNK     0       1.879   0.270   0.000  0.00  0.00           C+0
HETATM   15  C   UNK     0       2.354   1.734   0.000  0.00  0.00           C+0
HETATM   16  C   UNK     0       3.894   1.734   0.000  0.00  0.00           C+0
HETATM   17  C   UNK     0       3.733   3.266   0.000  0.00  0.00           C+0
HETATM   18  C   UNK     0       5.401   2.055   0.000  0.00  0.00           C+0
HETATM   19  C   UNK     0       4.370   0.270   0.000  0.00  0.00           C+0
CONECT    1    2                                                            
CONECT    2    1    3   13                                                  
CONECT    3    2    4                                                       
CONECT    4    3    5   11                                                  
CONECT    5    4    6    9                                                  
CONECT    6    5    7    8                                                  
CONECT    7    6                                                            
CONECT    8    6                                                            
CONECT    9    5   10                                                       
CONECT   10    9   11                                                       
CONECT   11   10    4   12                                                  
CONECT   12   11                                                            
CONECT   13    2   14   19                                                  
CONECT   14   13   15                                                       
CONECT   15   14   16                                                       
CONECT   16   15   17   18   19                                             
CONECT   17   16                                                            
CONECT   18   16                                                            
CONECT   19   16   13                                                       
MASTER        0    0    0    0    0    0    0    0   19    0   40    0
END

View in JSmol

Synonyms

Value	Source
4-[2-(4,4-Dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2,5-dihydrofuran-3-carboxylate	Generator

Chemical Formula

C₁₅H₂₀O₄

Average Mass

264.3210 Da

Monoisotopic Mass

264.13616 Da

IUPAC Name

4-[2-(4,4-dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2,5-dihydrofuran-3-carboxylic acid

Traditional Name

4-[2-(4,4-dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2H-furan-3-carboxylic acid

CAS Registry Number

Not Available

SMILES

CC(CC1=C(COC1=O)C(O)=O)C1=CCC(C)(C)C1

InChI Identifier

InChI=1S/C15H20O4/c1-9(10-4-5-15(2,3)7-10)6-11-12(13(16)17)8-19-14(11)18/h4,9H,5-8H2,1-3H3,(H,16,17)

InChI Key

OZQQHYHARGIDIF-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
Strobilurus stephanocystis	LOTUS Database	35616633

Chemical Taxonomy

Description

Belongs to the class of organic compounds known as terpene lactones. These are prenol lipids containing a lactone ring.

Kingdom

Organic compounds

Super Class

Lipids and lipid-like molecules

Class

Prenol lipids

Sub Class

Terpene lactones

Direct Parent

Terpene lactones

Alternative Parents

Substituents

Terpene lactone
Monocyclic monoterpenoid
Monoterpenoid
2-furanone
Dicarboxylic acid or derivatives
Dihydrofuran
Alpha,beta-unsaturated carboxylic ester
Enoate ester
Carboxylic acid ester
Lactone
Carboxylic acid derivative
Carboxylic acid
Oxacycle
Organoheterocyclic compound
Organic oxygen compound
Organic oxide
Hydrocarbon derivative
Carbonyl group
Organooxygen compound
Aliphatic heteromonocyclic compound

Molecular Framework

Aliphatic heteromonocyclic 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	2.88	ChemAxon
pKa (Strongest Acidic)	3.72	ChemAxon
pKa (Strongest Basic)	-6.9	ChemAxon
Physiological Charge	-1	ChemAxon
Hydrogen Acceptor Count	3	ChemAxon
Hydrogen Donor Count	1	ChemAxon
Polar Surface Area	63.6 Å²	ChemAxon
Rotatable Bond Count	4	ChemAxon
Refractivity	71.78 m³·mol⁻¹	ChemAxon
Polarizability	27.7 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

Not Available

Chemspider ID

28285507

KEGG Compound ID

Not Available

BioCyc ID

Not Available

BiGG ID

Not Available

Wikipedia Link

Not Available

METLIN ID

Not Available

PubChem Compound

163017244

PDB ID

Not Available

ChEBI ID

Not Available

Good Scents ID

Not Available

References

General References

Authors unspecified: Thalidomide. 2012. [PubMed:36070501 ]
Authors unspecified: Lenalidomide. 2012. [PubMed:36070500 ]
Uehara M, Wada-Hiraike O, Koga K, Yamamoto N, Hirano M, Harada M, Hirota Y, Osuga Y: Prediction of the final menstrual period in women taking Dienogest using estradiol and follicle-stimulating hormone values: a case-control study. Endocr J. 2022 Sep 7. doi: 10.1507/endocrj.EJ22-0158. [PubMed:36070964 ]
Oginosawa Y: Validation of the Implantable Cardioverter-Defibrillators Indication Criteria for Nonischemic Cardiomyopathy- Why? When? How? Circ J. 2022 Sep 6. doi: 10.1253/circj.CJ-22-0478. [PubMed:36070963 ]
Kodera S, Morita H, Nishi H, Takeda N, Ando J, Komuro I: Cost-Effectiveness of Dapagliflozin for Chronic Kidney Disease in Japan. Circ J. 2022 Sep 6. doi: 10.1253/circj.CJ-22-0086. [PubMed:36070962 ]
LOTUS database [Link]

Showing NP-Card for 4-[2-(4,4-dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2h-furan-3-carboxylic acid (NP0202632)

MOL for NP0202632 (4-[2-(4,4-dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2h-furan-3-carboxylic acid)

3D MOL for NP0202632 (4-[2-(4,4-dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2h-furan-3-carboxylic acid)

3D SDF for NP0202632 (4-[2-(4,4-dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2h-furan-3-carboxylic acid)

3D-SDF for NP0202632 (4-[2-(4,4-dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2h-furan-3-carboxylic acid)

PDB for NP0202632 (4-[2-(4,4-dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2h-furan-3-carboxylic acid)

3D PDB for NP0202632 (4-[2-(4,4-dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2h-furan-3-carboxylic acid)

SMILES for NP0202632 (4-[2-(4,4-dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2h-furan-3-carboxylic acid)

INCHI for NP0202632 (4-[2-(4,4-dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2h-furan-3-carboxylic acid)

Structure for NP0202632 (4-[2-(4,4-dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2h-furan-3-carboxylic acid)

3D Structure for NP0202632 (4-[2-(4,4-dimethylcyclopent-1-en-1-yl)propyl]-5-oxo-2h-furan-3-carboxylic acid)