NP-MRD: Showing NP-Card for (1r,2s,3r,4as,5s,5's,8as)-5-(chloromethyl)-5'-(furan-3-yl)-3,5-dihydroxy-2-methyl-2',4,6-trioxo-tetrahydro-2h-spiro[naphthalene-1,3'-oxolan]-4a-ylmethyl acetate (NP0234629)

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Record Information

Version

2.0

Created at

2022-09-06 16:46:42 UTC

Updated at

2022-09-06 16:46:43 UTC

NP-MRD ID

NP0234629

Secondary Accession Numbers

None

Natural Product Identification

Common Name

(1r,2s,3r,4as,5s,5's,8as)-5-(chloromethyl)-5'-(furan-3-yl)-3,5-dihydroxy-2-methyl-2',4,6-trioxo-tetrahydro-2h-spiro[naphthalene-1,3'-oxolan]-4a-ylmethyl acetate

Description

Teuracemin belongs to the class of organic compounds known as diterpene lactones. These are diterpenoids containing a lactone moiety. (1r,2s,3r,4as,5s,5's,8as)-5-(chloromethyl)-5'-(furan-3-yl)-3,5-dihydroxy-2-methyl-2',4,6-trioxo-tetrahydro-2h-spiro[naphthalene-1,3'-oxolan]-4a-ylmethyl acetate is found in Teucrium racemosum. Based on a literature review very few articles have been published on Teuracemin.

Structure

MOL SDF PDB SMILES InChI


  Mrv1652309062218462D          

 32 35  0  0  1  0            999 V2000
   -1.8820    1.8640    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0926    2.1037    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.9055    2.9072    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.4902    1.5400    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.2992    1.7798    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.9015    1.2160    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    1.0886    2.0195    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.4862    2.5833    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.8779    2.2593    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    2.0650    3.0628    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.4803    1.6956    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    3.2697    1.9353    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.2932    0.8920    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    3.1034    1.0480    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.5020    0.3257    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    4.3207    0.2237    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.7194   -0.4986    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.5295   -0.3427    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.6315    0.4760    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    4.8844    0.8260    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.9383   -0.2766    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.1912    0.0734    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.6275   -0.5290    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.5039    0.6523    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    1.3168   -0.1512    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.5274   -0.3910    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0749    0.1727    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.8643   -0.0670    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.1121    0.9762    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
   -0.6684    0.7091    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.6844    1.1912    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.2688    0.6089    0.0000 Cl  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
  2  4  1  0  0  0  0
  4  5  1  0  0  0  0
  6  5  1  1  0  0  0
  6  7  1  0  0  0  0
  7  8  2  0  0  0  0
  7  9  1  0  0  0  0
  9 10  1  6  0  0  0
  9 11  1  0  0  0  0
 11 12  1  1  0  0  0
 11 13  1  0  0  0  0
 13 14  1  1  0  0  0
 14 15  1  0  0  0  0
 15 16  1  1  0  0  0
 16 17  1  0  0  0  0
 17 18  2  0  0  0  0
 18 19  1  0  0  0  0
 19 20  1  0  0  0  0
 16 20  2  0  0  0  0
 15 21  1  0  0  0  0
 21 22  1  0  0  0  0
 13 22  1  0  0  0  0
 22 23  2  0  0  0  0
 13 24  1  0  0  0  0
  6 24  1  0  0  0  0
 24 25  1  1  0  0  0
 25 26  1  0  0  0  0
 26 27  1  0  0  0  0
 27 28  2  0  0  0  0
 27 29  1  0  0  0  0
  6 29  1  0  0  0  0
 29 30  1  1  0  0  0
 29 31  1  6  0  0  0
 31 32  1  0  0  0  0
M  END


  Mrv1652309062218462D          

 32 35  0  0  1  0            999 V2000
   -1.8820    1.8640    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0926    2.1037    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.9055    2.9072    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.4902    1.5400    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.2992    1.7798    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.9015    1.2160    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    1.0886    2.0195    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.4862    2.5833    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.8779    2.2593    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    2.0650    3.0628    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.4803    1.6956    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    3.2697    1.9353    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.2932    0.8920    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    3.1034    1.0480    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.5020    0.3257    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    4.3207    0.2237    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.7194   -0.4986    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.5295   -0.3427    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.6315    0.4760    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    4.8844    0.8260    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.9383   -0.2766    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.1912    0.0734    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.6275   -0.5290    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.5039    0.6523    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    1.3168   -0.1512    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.5274   -0.3910    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0749    0.1727    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.8643   -0.0670    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.1121    0.9762    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
   -0.6684    0.7091    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.6844    1.1912    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.2688    0.6089    0.0000 Cl  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
  2  4  1  0  0  0  0
  4  5  1  0  0  0  0
  6  5  1  1  0  0  0
  6  7  1  0  0  0  0
  7  8  2  0  0  0  0
  7  9  1  0  0  0  0
  9 10  1  6  0  0  0
  9 11  1  0  0  0  0
 11 12  1  1  0  0  0
 11 13  1  0  0  0  0
 13 14  1  1  0  0  0
 14 15  1  0  0  0  0
 15 16  1  1  0  0  0
 16 17  1  0  0  0  0
 17 18  2  0  0  0  0
 18 19  1  0  0  0  0
 19 20  1  0  0  0  0
 16 20  2  0  0  0  0
 15 21  1  0  0  0  0
 21 22  1  0  0  0  0
 13 22  1  0  0  0  0
 22 23  2  0  0  0  0
 13 24  1  0  0  0  0
  6 24  1  0  0  0  0
 24 25  1  1  0  0  0
 25 26  1  0  0  0  0
 26 27  1  0  0  0  0
 27 28  2  0  0  0  0
 27 29  1  0  0  0  0
  6 29  1  0  0  0  0
 29 30  1  1  0  0  0
 29 31  1  6  0  0  0
 31 32  1  0  0  0  0
M  END
> <DATABASE_ID>
NP0234629

> <DATABASE_NAME>
NP-MRD

> <SMILES>
C[C@@H]1[C@@H](O)C(=O)[C@]2(COC(C)=O)[C@H](CCC(=O)[C@]2(O)CCl)[C@]11C[C@H](OC1=O)C1=COC=C1

> <INCHI_IDENTIFIER>
InChI=1S/C22H25ClO9/c1-11-17(26)18(27)21(10-31-12(2)24)15(3-4-16(25)22(21,29)9-23)20(11)7-14(32-19(20)28)13-5-6-30-8-13/h5-6,8,11,14-15,17,26,29H,3-4,7,9-10H2,1-2H3/t11-,14+,15-,17-,20+,21+,22-/m1/s1

> <INCHI_KEY>
MOTQKGQROGKJJP-WEVNQPJTSA-N

> <FORMULA>
C22H25ClO9

> <MOLECULAR_WEIGHT>
468.88

> <EXACT_MASS>
468.1187101

> <JCHEM_ACCEPTOR_COUNT>
6

> <JCHEM_ATOM_COUNT>
57

> <JCHEM_AVERAGE_POLARIZABILITY>
44.18442767976566

> <JCHEM_BIOAVAILABILITY>
1

> <JCHEM_DONOR_COUNT>
2

> <JCHEM_FORMAL_CHARGE>
0

> <JCHEM_GHOSE_FILTER>
1

> <JCHEM_IUPAC>
[(1R,2S,3R,4aS,5S,5'S,8aS)-5-(chloromethyl)-5'-(furan-3-yl)-3,5-dihydroxy-2-methyl-2',4,6-trioxo-octahydro-2H-spiro[naphthalene-1,3'-oxolane]-4a-yl]methyl acetate

> <JCHEM_LOGP>
1.1755638133333328

> <JCHEM_MDDR_LIKE_RULE>
0

> <JCHEM_NUMBER_OF_RINGS>
4

> <JCHEM_PHYSIOLOGICAL_CHARGE>
0

> <JCHEM_PKA>
13.133426099933676

> <JCHEM_PKA_STRONGEST_ACIDIC>
11.719467688344855

> <JCHEM_PKA_STRONGEST_BASIC>
-2.8885783930382827

> <JCHEM_POLAR_SURFACE_AREA>
140.34

> <JCHEM_REFRACTIVITY>
108.02349999999997

> <JCHEM_ROTATABLE_BOND_COUNT>
5

> <JCHEM_RULE_OF_FIVE>
1

> <JCHEM_TRADITIONAL_IUPAC>
(1R,2S,3R,4aS,5S,5'S,8aS)-5-(chloromethyl)-5'-(furan-3-yl)-3,5-dihydroxy-2-methyl-2',4,6-trioxo-tetrahydro-2H-spiro[naphthalene-1,3'-oxolane]-4a-ylmethyl acetate

> <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      -3.513   3.479   0.000  0.00  0.00           C+0
HETATM    2  C   UNK     0      -2.039   3.927   0.000  0.00  0.00           C+0
HETATM    3  O   UNK     0      -1.690   5.427   0.000  0.00  0.00           O+0
HETATM    4  O   UNK     0      -0.915   2.875   0.000  0.00  0.00           O+0
HETATM    5  C   UNK     0       0.558   3.322   0.000  0.00  0.00           C+0
HETATM    6  C   UNK     0       1.683   2.270   0.000  0.00  0.00           C+0
HETATM    7  C   UNK     0       2.032   3.770   0.000  0.00  0.00           C+0
HETATM    8  O   UNK     0       0.908   4.822   0.000  0.00  0.00           O+0
HETATM    9  C   UNK     0       3.505   4.217   0.000  0.00  0.00           C+0
HETATM   10  O   UNK     0       3.855   5.717   0.000  0.00  0.00           O+0
HETATM   11  C   UNK     0       4.630   3.165   0.000  0.00  0.00           C+0
HETATM   12  C   UNK     0       6.103   3.613   0.000  0.00  0.00           C+0
HETATM   13  C   UNK     0       4.281   1.665   0.000  0.00  0.00           C+0
HETATM   14  C   UNK     0       5.793   1.956   0.000  0.00  0.00           C+0
HETATM   15  C   UNK     0       6.537   0.608   0.000  0.00  0.00           C+0
HETATM   16  C   UNK     0       8.065   0.418   0.000  0.00  0.00           C+0
HETATM   17  C   UNK     0       8.809  -0.931   0.000  0.00  0.00           C+0
HETATM   18  C   UNK     0      10.322  -0.640   0.000  0.00  0.00           C+0
HETATM   19  O   UNK     0      10.512   0.889   0.000  0.00  0.00           O+0
HETATM   20  C   UNK     0       9.118   1.542   0.000  0.00  0.00           C+0
HETATM   21  O   UNK     0       5.485  -0.516   0.000  0.00  0.00           O+0
HETATM   22  C   UNK     0       4.090   0.137   0.000  0.00  0.00           C+0
HETATM   23  O   UNK     0       3.038  -0.987   0.000  0.00  0.00           O+0
HETATM   24  C   UNK     0       2.807   1.218   0.000  0.00  0.00           C+0
HETATM   25  C   UNK     0       2.458  -0.282   0.000  0.00  0.00           C+0
HETATM   26  C   UNK     0       0.985  -0.730   0.000  0.00  0.00           C+0
HETATM   27  C   UNK     0      -0.140   0.322   0.000  0.00  0.00           C+0
HETATM   28  O   UNK     0      -1.613  -0.125   0.000  0.00  0.00           O+0
HETATM   29  C   UNK     0       0.209   1.822   0.000  0.00  0.00           C+0
HETATM   30  O   UNK     0      -1.248   1.324   0.000  0.00  0.00           O+0
HETATM   31  C   UNK     0      -1.277   2.224   0.000  0.00  0.00           C+0
HETATM   32 Cl   UNK     0      -2.368   1.137   0.000  0.00  0.00          Cl+0
CONECT    1    2                                                            
CONECT    2    1    3    4                                                  
CONECT    3    2                                                            
CONECT    4    2    5                                                       
CONECT    5    4    6                                                       
CONECT    6    5    7   24   29                                             
CONECT    7    6    8    9                                                  
CONECT    8    7                                                            
CONECT    9    7   10   11                                                  
CONECT   10    9                                                            
CONECT   11    9   12   13                                                  
CONECT   12   11                                                            
CONECT   13   11   14   22   24                                             
CONECT   14   13   15                                                       
CONECT   15   14   16   21                                                  
CONECT   16   15   17   20                                                  
CONECT   17   16   18                                                       
CONECT   18   17   19                                                       
CONECT   19   18   20                                                       
CONECT   20   19   16                                                       
CONECT   21   15   22                                                       
CONECT   22   21   13   23                                                  
CONECT   23   22                                                            
CONECT   24   13    6   25                                                  
CONECT   25   24   26                                                       
CONECT   26   25   27                                                       
CONECT   27   26   28   29                                                  
CONECT   28   27                                                            
CONECT   29   27    6   30   31                                             
CONECT   30   29                                                            
CONECT   31   29   32                                                       
CONECT   32   31                                                            
MASTER        0    0    0    0    0    0    0    0   32    0   70    0
END

View in JSmol

Synonyms

Not Available

Chemical Formula

C₂₂H₂₅ClO₉

Average Mass

468.8800 Da

Monoisotopic Mass

468.11871 Da

IUPAC Name

Not Available

Traditional Name

Not Available

CAS Registry Number

Not Available

SMILES

C[C@@H]1[C@@H](O)C(=O)[C@]2(COC(C)=O)[C@H](CCC(=O)[C@]2(O)CCl)[C@]11C[C@H](OC1=O)C1=COC=C1

InChI Identifier

InChI=1S/C22H25ClO9/c1-11-17(26)18(27)21(10-31-12(2)24)15(3-4-16(25)22(21,29)9-23)20(11)7-14(32-19(20)28)13-5-6-30-8-13/h5-6,8,11,14-15,17,26,29H,3-4,7,9-10H2,1-2H3/t11-,14+,15-,17-,20+,21+,22-/m1/s1

InChI Key

MOTQKGQROGKJJP-WEVNQPJTSA-N

Experimental Spectra

Not Available

Predicted Spectra

Not Available

Chemical Shift Submissions

Not Available

Species

Species of Origin

Species Name	Source	Reference
Teucrium racemosum	LOTUS Database	35616633

Chemical Taxonomy

Description

Belongs to the class of organic compounds known as diterpene lactones. These are diterpenoids containing a lactone moiety.

Kingdom

Organic compounds

Super Class

Lipids and lipid-like molecules

Class

Prenol lipids

Sub Class

Terpene lactones

Direct Parent

Diterpene lactones

Alternative Parents

Substituents

Clerodane diterpenoid
Diterpenoid
Diterpene lactone
Gamma butyrolactone
Dicarboxylic acid or derivatives
Acyloin
Heteroaromatic compound
Tetrahydrofuran
Tertiary alcohol
Furan
Cyclic alcohol
Cyclic ketone
Secondary alcohol
Lactone
Ketone
Halohydrin
Chlorohydrin
Carboxylic acid ester
Oxacycle
Organoheterocyclic compound
Carboxylic acid derivative
Organic oxygen compound
Organic oxide
Hydrocarbon derivative
Organooxygen compound
Organochloride
Organohalogen compound
Carbonyl group
Alkyl halide
Alkyl chloride
Alcohol
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

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

15226270

PDB ID

Not Available

ChEBI ID

Not Available

Good Scents ID

Not Available

References

General References

LOTUS database [Link]

Showing NP-Card for (1r,2s,3r,4as,5s,5's,8as)-5-(chloromethyl)-5'-(furan-3-yl)-3,5-dihydroxy-2-methyl-2',4,6-trioxo-tetrahydro-2h-spiro[naphthalene-1,3'-oxolan]-4a-ylmethyl acetate (NP0234629)

MOL for NP0234629 ((1r,2s,3r,4as,5s,5's,8as)-5-(chloromethyl)-5'-(furan-3-yl)-3,5-dihydroxy-2-methyl-2',4,6-trioxo-tetrahydro-2h-spiro[naphthalene-1,3'-oxolan]-4a-ylmethyl acetate)

3D MOL for NP0234629 ((1r,2s,3r,4as,5s,5's,8as)-5-(chloromethyl)-5'-(furan-3-yl)-3,5-dihydroxy-2-methyl-2',4,6-trioxo-tetrahydro-2h-spiro[naphthalene-1,3'-oxolan]-4a-ylmethyl acetate)

3D SDF for NP0234629 ((1r,2s,3r,4as,5s,5's,8as)-5-(chloromethyl)-5'-(furan-3-yl)-3,5-dihydroxy-2-methyl-2',4,6-trioxo-tetrahydro-2h-spiro[naphthalene-1,3'-oxolan]-4a-ylmethyl acetate)

3D-SDF for NP0234629 ((1r,2s,3r,4as,5s,5's,8as)-5-(chloromethyl)-5'-(furan-3-yl)-3,5-dihydroxy-2-methyl-2',4,6-trioxo-tetrahydro-2h-spiro[naphthalene-1,3'-oxolan]-4a-ylmethyl acetate)

PDB for NP0234629 ((1r,2s,3r,4as,5s,5's,8as)-5-(chloromethyl)-5'-(furan-3-yl)-3,5-dihydroxy-2-methyl-2',4,6-trioxo-tetrahydro-2h-spiro[naphthalene-1,3'-oxolan]-4a-ylmethyl acetate)

3D PDB for NP0234629 ((1r,2s,3r,4as,5s,5's,8as)-5-(chloromethyl)-5'-(furan-3-yl)-3,5-dihydroxy-2-methyl-2',4,6-trioxo-tetrahydro-2h-spiro[naphthalene-1,3'-oxolan]-4a-ylmethyl acetate)

SMILES for NP0234629 ((1r,2s,3r,4as,5s,5's,8as)-5-(chloromethyl)-5'-(furan-3-yl)-3,5-dihydroxy-2-methyl-2',4,6-trioxo-tetrahydro-2h-spiro[naphthalene-1,3'-oxolan]-4a-ylmethyl acetate)

INCHI for NP0234629 ((1r,2s,3r,4as,5s,5's,8as)-5-(chloromethyl)-5'-(furan-3-yl)-3,5-dihydroxy-2-methyl-2',4,6-trioxo-tetrahydro-2h-spiro[naphthalene-1,3'-oxolan]-4a-ylmethyl acetate)

Structure for NP0234629 ((1r,2s,3r,4as,5s,5's,8as)-5-(chloromethyl)-5'-(furan-3-yl)-3,5-dihydroxy-2-methyl-2',4,6-trioxo-tetrahydro-2h-spiro[naphthalene-1,3'-oxolan]-4a-ylmethyl acetate)

3D Structure for NP0234629 ((1r,2s,3r,4as,5s,5's,8as)-5-(chloromethyl)-5'-(furan-3-yl)-3,5-dihydroxy-2-methyl-2',4,6-trioxo-tetrahydro-2h-spiro[naphthalene-1,3'-oxolan]-4a-ylmethyl acetate)