NP-MRD: Showing NP-Card for (1s,2s,4r,5s,6r,11s)-4,5,11-trihydroxy-2,6,11-trimethyl-8-oxatricyclo[4.4.3.0¹,⁵]tridecane-9,12-dione (NP0238717)

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Record Information

Version

2.0

Created at

2022-09-06 22:09:28 UTC

Updated at

2022-09-06 22:09:29 UTC

NP-MRD ID

NP0238717

Secondary Accession Numbers

None

Natural Product Identification

Common Name

(1s,2s,4r,5s,6r,11s)-4,5,11-trihydroxy-2,6,11-trimethyl-8-oxatricyclo[4.4.3.0¹,⁵]tridecane-9,12-dione

Description

(1S,2S,4R,5S,6R,11S)-4,5,11-trihydroxy-2,6,11-trimethyl-8-oxatricyclo[4.4.3.0¹,⁵]Tridecane-9,12-dione belongs to the class of organic compounds known as terpene lactones. These are prenol lipids containing a lactone ring. (1s,2s,4r,5s,6r,11s)-4,5,11-trihydroxy-2,6,11-trimethyl-8-oxatricyclo[4.4.3.0¹,⁵]tridecane-9,12-dione is found in Illicium anisatum. Based on a literature review very few articles have been published on (1S,2S,4R,5S,6R,11S)-4,5,11-trihydroxy-2,6,11-trimethyl-8-oxatricyclo[4.4.3.0¹,⁵]Tridecane-9,12-dione.

Structure

MOL 3D MOL SDF PDB SMILES InChI

     RDKit          3D

 43 45  0  0  0  0  0  0  0  0999 V2000
   -2.6853   -0.7138   -1.0005 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.7168   -0.8709    0.0746 C   0  0  1  0  0  0  0  0  0  0  0  0
   -1.0083   -2.2024   -0.0859 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.4155   -1.9132   -0.5171 C   0  0  1  0  0  0  0  0  0  0  0  0
    0.5252   -2.4829   -1.8216 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.4939   -0.4517   -0.4907 C   0  0  1  0  0  0  0  0  0  0  0  0
   -0.0225   -0.1454   -1.7984 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.6414    0.0662    0.3862 C   0  0  2  0  0  0  0  0  0  0  0  0
   -0.1845   -0.1549    1.7868 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.9069   -1.1295    2.0087 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.7457   -2.0941    2.7999 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.2134   -1.1798    1.4460 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.6424   -0.7097    0.1355 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.6818    0.3112   -0.1644 C   0  0  2  0  0  0  0  0  0  0  0  0
    1.9273    1.2315    1.0013 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.6656    1.3691   -1.2073 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.3967    2.0884   -0.7467 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.3769    3.2802   -0.9371 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.7753    1.4679   -0.1064 C   0  0  2  0  0  0  0  0  0  0  0  0
   -1.5100    2.3732    0.8480 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.6673    1.3858   -1.2195 O   0  0  0  0  0  0  0  0  0  0  0  0
   -3.4886    0.0294   -0.8098 H   0  0  0  0  0  0  0  0  0  0  0  0
   -3.2843   -1.6881   -0.9916 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.3541   -0.6580   -2.0322 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.3268   -0.9832    1.0286 H   0  0  0  0  0  0  0  0  0  0  0  0
   -1.5585   -2.8421   -0.8118 H   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0399   -2.8075    0.8669 H   0  0  0  0  0  0  0  0  0  0  0  0
    1.0552   -2.5574    0.0427 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0280   -3.2888   -1.8886 H   0  0  0  0  0  0  0  0  0  0  0  0
    0.4074   -0.6820   -2.4804 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0762    0.7784    2.3806 H   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0636   -0.6220    2.3464 H   0  0  0  0  0  0  0  0  0  0  0  0
    3.6865   -0.3303    0.3058 H   0  0  0  0  0  0  0  0  0  0  0  0
    2.7449   -1.5561   -0.5585 H   0  0  0  0  0  0  0  0  0  0  0  0
    2.9701    1.6588    0.7142 H   0  0  0  0  0  0  0  0  0  0  0  0
    1.3578    2.1485    1.0423 H   0  0  0  0  0  0  0  0  0  0  0  0
    2.2553    0.8127    1.9477 H   0  0  0  0  0  0  0  0  0  0  0  0
    2.5035    2.0631   -1.1934 H   0  0  0  0  0  0  0  0  0  0  0  0
    1.5181    1.0092   -2.2418 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.8761    2.5238    1.7408 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4145    1.8386    1.2064 H   0  0  0  0  0  0  0  0  0  0  0  0
   -1.7282    3.3604    0.4271 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.0395    2.2671   -1.4331 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  1  0
  4  6  1  0
  6  7  1  6
  6  8  1  0
  8  9  1  1
  9 10  1  0
 10 11  2  0
 10 12  1  0
 12 13  1  0
 13 14  1  0
 14 15  1  1
 14 16  1  0
 16 17  1  0
 17 18  2  0
 17 19  1  0
 19 20  1  0
 19 21  1  6
  8  2  1  0
 19  8  1  0
 14  6  1  0
  1 22  1  0
  1 23  1  0
  1 24  1  0
  2 25  1  1
  3 26  1  0
  3 27  1  0
  4 28  1  1
  5 29  1  0
  7 30  1  0
  9 31  1  0
  9 32  1  0
 13 33  1  0
 13 34  1  0
 15 35  1  0
 15 36  1  0
 15 37  1  0
 16 38  1  0
 16 39  1  0
 20 40  1  0
 20 41  1  0
 20 42  1  0
 21 43  1  0
M  END


  Mrv1652309072200092D          

 21 23  0  0  1  0            999 V2000
    0.0886    0.9140    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.4646    0.3108    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    0.2611   -0.5460    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.9089   -1.0569    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    0.8764   -1.8813    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.5949   -0.5987    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    2.3110   -0.1890    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.3712    0.1954    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    0.6288    0.0519    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.4823   -0.7600    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.3307   -0.9001    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.8920   -1.4761    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.6662   -1.7613    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.4425   -1.4822    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    2.9703   -2.1162    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.8578   -0.7693    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.7177    0.0437    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.4338    0.4534    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.0878    0.5765    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    2.5619    1.2517    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.7675    1.3368    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
  2  1  1  6  0  0  0
  2  3  1  0  0  0  0
  3  4  1  0  0  0  0
  4  5  1  6  0  0  0
  4  6  1  0  0  0  0
  6  7  1  6  0  0  0
  6  8  1  0  0  0  0
  2  8  1  0  0  0  0
  8  9  1  1  0  0  0
  9 10  1  0  0  0  0
 10 11  2  0  0  0  0
 10 12  1  0  0  0  0
 12 13  1  0  0  0  0
 13 14  1  0  0  0  0
  6 14  1  0  0  0  0
 14 15  1  1  0  0  0
 14 16  1  0  0  0  0
 16 17  1  0  0  0  0
 17 18  2  0  0  0  0
 17 19  1  0  0  0  0
  8 19  1  0  0  0  0
 19 20  1  1  0  0  0
 19 21  1  6  0  0  0
M  END
> <DATABASE_ID>
NP0238717

> <DATABASE_NAME>
NP-MRD

> <SMILES>
C[C@H]1C[C@@H](O)[C@@]2(O)[C@]11CC(=O)OC[C@@]2(C)CC(=O)[C@@]1(C)O

> <INCHI_IDENTIFIER>
InChI=1S/C15H22O6/c1-8-4-9(16)15(20)12(2)5-10(17)13(3,19)14(8,15)6-11(18)21-7-12/h8-9,16,19-20H,4-7H2,1-3H3/t8-,9+,12+,13+,14+,15-/m0/s1

> <INCHI_KEY>
LJKJTESYAFXEPG-WWYRSNQNSA-N

> <FORMULA>
C15H22O6

> <MOLECULAR_WEIGHT>
298.335

> <EXACT_MASS>
298.141638428

> <JCHEM_ACCEPTOR_COUNT>
5

> <JCHEM_ATOM_COUNT>
43

> <JCHEM_AVERAGE_POLARIZABILITY>
29.4789262798619

> <JCHEM_BIOAVAILABILITY>
1

> <JCHEM_DONOR_COUNT>
3

> <JCHEM_FORMAL_CHARGE>
0

> <JCHEM_GHOSE_FILTER>
0

> <JCHEM_IUPAC>
(1S,2S,4R,5S,6R,11S)-4,5,11-trihydroxy-2,6,11-trimethyl-8-oxatricyclo[4.4.3.0^{1,5}]tridecane-9,12-dione

> <JCHEM_LOGP>
-0.6354539663333335

> <JCHEM_MDDR_LIKE_RULE>
0

> <JCHEM_NUMBER_OF_RINGS>
3

> <JCHEM_PHYSIOLOGICAL_CHARGE>
0

> <JCHEM_PKA>
13.231640294604375

> <JCHEM_PKA_STRONGEST_ACIDIC>
12.48046262369347

> <JCHEM_PKA_STRONGEST_BASIC>
-3.2588620794436043

> <JCHEM_POLAR_SURFACE_AREA>
104.06000000000002

> <JCHEM_REFRACTIVITY>
71.5268

> <JCHEM_ROTATABLE_BOND_COUNT>
0

> <JCHEM_RULE_OF_FIVE>
1

> <JCHEM_TRADITIONAL_IUPAC>
(1S,2S,4R,5S,6R,11S)-4,5,11-trihydroxy-2,6,11-trimethyl-8-oxatricyclo[4.4.3.0^{1,5}]tridecane-9,12-dione

> <JCHEM_VEBER_RULE>
0

$$$$

HEADER    PROTEIN                                 07-SEP-22   NONE
TITLE     NULL                                                        
COMPND    NULL                                                        
SOURCE    NULL                                                        
KEYWDS    NULL                                                        
EXPDTA    NULL                                                        
AUTHOR    Marvin                                                      
REVDAT   1   07-SEP-22         0                                  
HETATM    1  C   UNK     0       0.165   1.706   0.000  0.00  0.00           C+0
HETATM    2  C   UNK     0       0.867   0.580   0.000  0.00  0.00           C+0
HETATM    3  C   UNK     0       0.487  -1.019   0.000  0.00  0.00           C+0
HETATM    4  C   UNK     0       1.697  -1.973   0.000  0.00  0.00           C+0
HETATM    5  O   UNK     0       1.636  -3.512   0.000  0.00  0.00           O+0
HETATM    6  C   UNK     0       2.977  -1.118   0.000  0.00  0.00           C+0
HETATM    7  O   UNK     0       4.314  -0.353   0.000  0.00  0.00           O+0
HETATM    8  C   UNK     0       2.559   0.365   0.000  0.00  0.00           C+0
HETATM    9  C   UNK     0       1.174   0.097   0.000  0.00  0.00           C+0
HETATM   10  C   UNK     0       0.900  -1.419   0.000  0.00  0.00           C+0
HETATM   11  O   UNK     0      -0.617  -1.680   0.000  0.00  0.00           O+0
HETATM   12  O   UNK     0       1.665  -2.755   0.000  0.00  0.00           O+0
HETATM   13  C   UNK     0       3.110  -3.288   0.000  0.00  0.00           C+0
HETATM   14  C   UNK     0       4.559  -2.767   0.000  0.00  0.00           C+0
HETATM   15  C   UNK     0       5.545  -3.950   0.000  0.00  0.00           C+0
HETATM   16  C   UNK     0       5.335  -1.436   0.000  0.00  0.00           C+0
HETATM   17  C   UNK     0       5.073   0.082   0.000  0.00  0.00           C+0
HETATM   18  O   UNK     0       6.410   0.846   0.000  0.00  0.00           O+0
HETATM   19  C   UNK     0       3.897   1.076   0.000  0.00  0.00           C+0
HETATM   20  C   UNK     0       4.782   2.337   0.000  0.00  0.00           C+0
HETATM   21  O   UNK     0       3.299   2.495   0.000  0.00  0.00           O+0
CONECT    1    2                                                            
CONECT    2    1    3    8                                                  
CONECT    3    2    4                                                       
CONECT    4    3    5    6                                                  
CONECT    5    4                                                            
CONECT    6    4    7    8   14                                             
CONECT    7    6                                                            
CONECT    8    6    2    9   19                                             
CONECT    9    8   10                                                       
CONECT   10    9   11   12                                                  
CONECT   11   10                                                            
CONECT   12   10   13                                                       
CONECT   13   12   14                                                       
CONECT   14   13    6   15   16                                             
CONECT   15   14                                                            
CONECT   16   14   17                                                       
CONECT   17   16   18   19                                                  
CONECT   18   17                                                            
CONECT   19   17    8   20   21                                             
CONECT   20   19                                                            
CONECT   21   19                                                            
MASTER        0    0    0    0    0    0    0    0   21    0   46    0
END

View in JSmol

Synonyms

Not Available

Chemical Formula

C₁₅H₂₂O₆

Average Mass

298.3350 Da

Monoisotopic Mass

298.14164 Da

IUPAC Name

Not Available

Traditional Name

Not Available

CAS Registry Number

Not Available

SMILES

C[C@H]1C[C@@H](O)[C@@]2(O)[C@]11CC(=O)OC[C@@]2(C)CC(=O)[C@@]1(C)O

InChI Identifier

InChI=1S/C15H22O6/c1-8-4-9(16)15(20)12(2)5-10(17)13(3,19)14(8,15)6-11(18)21-7-12/h8-9,16,19-20H,4-7H2,1-3H3/t8-,9+,12+,13+,14+,15-/m0/s1

InChI Key

LJKJTESYAFXEPG-WWYRSNQNSA-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
Illicium anisatum	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
11-noriridane monoterpenoid
Monoterpenoid
Caprolactone
Oxepane
Acyloin
Cyclic alcohol
Tertiary alcohol
Secondary alcohol
Cyclic ketone
Lactone
Ketone
Carboxylic acid ester
Polyol
Organoheterocyclic compound
Oxacycle
Monocarboxylic acid or derivatives
Carboxylic acid derivative
Alcohol
Organic oxygen compound
Hydrocarbon derivative
Carbonyl group
Organic oxide
Organooxygen compound
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

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

162988306

PDB ID

Not Available

ChEBI ID

Not Available

Good Scents ID

Not Available

References

General References

LOTUS database [Link]

Showing NP-Card for (1s,2s,4r,5s,6r,11s)-4,5,11-trihydroxy-2,6,11-trimethyl-8-oxatricyclo[4.4.3.0¹,⁵]tridecane-9,12-dione (NP0238717)

MOL for NP0238717 ((1s,2s,4r,5s,6r,11s)-4,5,11-trihydroxy-2,6,11-trimethyl-8-oxatricyclo[4.4.3.0¹,⁵]tridecane-9,12-dione)

3D MOL for NP0238717 ((1s,2s,4r,5s,6r,11s)-4,5,11-trihydroxy-2,6,11-trimethyl-8-oxatricyclo[4.4.3.0¹,⁵]tridecane-9,12-dione)

3D SDF for NP0238717 ((1s,2s,4r,5s,6r,11s)-4,5,11-trihydroxy-2,6,11-trimethyl-8-oxatricyclo[4.4.3.0¹,⁵]tridecane-9,12-dione)

3D-SDF for NP0238717 ((1s,2s,4r,5s,6r,11s)-4,5,11-trihydroxy-2,6,11-trimethyl-8-oxatricyclo[4.4.3.0¹,⁵]tridecane-9,12-dione)

PDB for NP0238717 ((1s,2s,4r,5s,6r,11s)-4,5,11-trihydroxy-2,6,11-trimethyl-8-oxatricyclo[4.4.3.0¹,⁵]tridecane-9,12-dione)

3D PDB for NP0238717 ((1s,2s,4r,5s,6r,11s)-4,5,11-trihydroxy-2,6,11-trimethyl-8-oxatricyclo[4.4.3.0¹,⁵]tridecane-9,12-dione)

SMILES for NP0238717 ((1s,2s,4r,5s,6r,11s)-4,5,11-trihydroxy-2,6,11-trimethyl-8-oxatricyclo[4.4.3.0¹,⁵]tridecane-9,12-dione)

INCHI for NP0238717 ((1s,2s,4r,5s,6r,11s)-4,5,11-trihydroxy-2,6,11-trimethyl-8-oxatricyclo[4.4.3.0¹,⁵]tridecane-9,12-dione)

Structure for NP0238717 ((1s,2s,4r,5s,6r,11s)-4,5,11-trihydroxy-2,6,11-trimethyl-8-oxatricyclo[4.4.3.0¹,⁵]tridecane-9,12-dione)

3D Structure for NP0238717 ((1s,2s,4r,5s,6r,11s)-4,5,11-trihydroxy-2,6,11-trimethyl-8-oxatricyclo[4.4.3.0¹,⁵]tridecane-9,12-dione)