NP-MRD: Showing NP-Card for 12-oxowithanolide (NP0331576)

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Record Information

Version

2.0

Created at

2023-04-04 00:16:35 UTC

Updated at

2024-09-03 04:16:10 UTC

NP-MRD ID

NP0331576

Natural Product DOI

https://doi.org/10.57994/0555

Secondary Accession Numbers

None

Natural Product Identification

Common Name

12-oxowithanolide

Description

59132-33-1 Belongs to the class of organic compounds known as withanolides and derivatives. These are c28 steroids structurally characterized by an ergostane skeleton usually functionalized at carbons 1, 22 and 26 to form a lactone ring. Based on a literature review very few articles have been published on 59132-33-1.

Structure

MOL SDF PDB SMILES InChI


  Mrv1652304042302162D          

 39 44  0  0  1  0            999 V2000
    3.9503   -1.7461    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.6700   -0.9702    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    3.3897   -0.1943    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    3.9215    0.4364    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    4.4533    1.0671    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    4.7336    0.2912    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    5.0139   -0.4847    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    5.8261   -0.6299    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    5.6284    0.1710    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
    6.1064   -1.4059    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    6.4662   -2.1482    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.9309   -1.3791    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    7.7430   -1.5243    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    8.0233   -2.3002    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    8.2749   -0.8936    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    8.5552   -1.6695    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
    7.9946   -0.1176    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    8.5264    0.5131    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    9.3385    0.3679    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    9.8703    0.9986    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    9.6188   -0.4081    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   10.4309   -0.5533    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    9.0870   -1.0388    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    8.2461    1.2890    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    6.8714   -2.2019    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    7.1602   -0.5866    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.4774   -0.1236    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.2942   -1.2606    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
    4.4821   -1.1154    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    4.2018   -0.3395    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
    4.7624   -1.8914    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.5745   -2.0366    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.8548   -2.8125    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.1094    0.5816    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.5776   -0.0491    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.0458   -0.6798    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.3261   -1.4557    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.1382   -1.6009    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.4185   -2.3768    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  1  0  0  0
  4  6  1  0  0  0  0
  6  5  1  1  0  0  0
  6  7  1  0  0  0  0
  7  8  1  0  0  0  0
  8  9  1  1  0  0  0
  8 10  1  0  0  0  0
 10 11  1  6  0  0  0
 10 12  1  0  0  0  0
 12 13  1  6  0  0  0
 13 14  1  1  0  0  0
 15 13  1  1  0  0  0
 15 16  1  6  0  0  0
 15 17  1  0  0  0  0
 17 18  1  0  0  0  0
 18 19  1  0  0  0  0
 19 20  1  0  0  0  0
 19 21  2  0  0  0  0
 21 22  1  0  0  0  0
 21 23  1  0  0  0  0
 15 23  1  0  0  0  0
 18 24  2  0  0  0  0
 12 25  1  1  0  0  0
 12 26  1  0  0  0  0
 26 27  1  0  0  0  0
  8 27  1  0  0  0  0
  7 28  1  6  0  0  0
  7 29  1  0  0  0  0
  2 29  1  0  0  0  0
 29 30  1  1  0  0  0
 29 31  1  0  0  0  0
 31 32  1  0  0  0  0
 10 32  1  0  0  0  0
 32 33  2  0  0  0  0
  3 34  1  1  0  0  0
  3 35  1  0  0  0  0
 35 36  1  0  0  0  0
 36 37  2  0  0  0  0
 37 38  1  0  0  0  0
  2 38  1  0  0  0  0
 38 39  2  0  0  0  0
M  END


  Mrv1652304042302162D          

 39 44  0  0  1  0            999 V2000
    3.9503   -1.7461    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.6700   -0.9702    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    3.3897   -0.1943    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    3.9215    0.4364    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    4.4533    1.0671    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    4.7336    0.2912    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    5.0139   -0.4847    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    5.8261   -0.6299    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    5.6284    0.1710    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
    6.1064   -1.4059    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    6.4662   -2.1482    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.9309   -1.3791    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    7.7430   -1.5243    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    8.0233   -2.3002    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    8.2749   -0.8936    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    8.5552   -1.6695    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
    7.9946   -0.1176    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    8.5264    0.5131    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    9.3385    0.3679    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    9.8703    0.9986    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    9.6188   -0.4081    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   10.4309   -0.5533    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    9.0870   -1.0388    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    8.2461    1.2890    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    6.8714   -2.2019    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    7.1602   -0.5866    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.4774   -0.1236    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.2942   -1.2606    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
    4.4821   -1.1154    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    4.2018   -0.3395    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
    4.7624   -1.8914    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.5745   -2.0366    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.8548   -2.8125    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.1094    0.5816    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.5776   -0.0491    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.0458   -0.6798    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.3261   -1.4557    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.1382   -1.6009    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.4185   -2.3768    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  1  0  0  0
  4  6  1  0  0  0  0
  6  5  1  1  0  0  0
  6  7  1  0  0  0  0
  7  8  1  0  0  0  0
  8  9  1  1  0  0  0
  8 10  1  0  0  0  0
 10 11  1  6  0  0  0
 10 12  1  0  0  0  0
 12 13  1  6  0  0  0
 13 14  1  1  0  0  0
 15 13  1  1  0  0  0
 15 16  1  6  0  0  0
 15 17  1  0  0  0  0
 17 18  1  0  0  0  0
 18 19  1  0  0  0  0
 19 20  1  0  0  0  0
 19 21  2  0  0  0  0
 21 22  1  0  0  0  0
 21 23  1  0  0  0  0
 15 23  1  0  0  0  0
 18 24  2  0  0  0  0
 12 25  1  1  0  0  0
 12 26  1  0  0  0  0
 26 27  1  0  0  0  0
  8 27  1  0  0  0  0
  7 28  1  6  0  0  0
  7 29  1  0  0  0  0
  2 29  1  0  0  0  0
 29 30  1  1  0  0  0
 29 31  1  0  0  0  0
 31 32  1  0  0  0  0
 10 32  1  0  0  0  0
 32 33  2  0  0  0  0
  3 34  1  1  0  0  0
  3 35  1  0  0  0  0
 35 36  1  0  0  0  0
 36 37  2  0  0  0  0
 37 38  1  0  0  0  0
  2 38  1  0  0  0  0
 38 39  2  0  0  0  0
M  END
> <DATABASE_ID>
NP0331576

> <DATABASE_NAME>
NP-MRD

> <SMILES>
[H][C@@]12CC[C@](O)([C@H](C)[C@]3([H])CC(C)=C(C)C(=O)O3)[C@@]1(C)C(=O)C[C@@]1([H])[C@@]2([H])[C@@H]2O[C@@H]2[C@@]2(O)CC=CC(=O)[C@]12C

> <INCHI_IDENTIFIER>
InChI=1S/C28H36O7/c1-13-11-18(34-24(31)14(13)2)15(3)27(32)10-8-16-21-17(12-20(30)25(16,27)4)26(5)19(29)7-6-9-28(26,33)23-22(21)35-23/h6-7,15-18,21-23,32-33H,8-12H2,1-5H3/t15-,16+,17+,18+,21+,22+,23+,25-,26+,27+,28+/m1/s1

> <INCHI_KEY>
DASIIWZHZVHTSC-NAPILNLDSA-N

> <FORMULA>
C28H36O7

> <MOLECULAR_WEIGHT>
484.589

> <EXACT_MASS>
484.246103499

$$$$

HEADER    PROTEIN                                 04-APR-23   NONE
TITLE     NULL                                                        
COMPND    NULL                                                        
SOURCE    NULL                                                        
KEYWDS    NULL                                                        
EXPDTA    NULL                                                        
AUTHOR    Marvin                                                      
REVDAT   1   04-APR-23         0                                  
HETATM    1  C   UNK     0       7.374  -3.259   0.000  0.00  0.00           C+0
HETATM    2  C   UNK     0       6.851  -1.811   0.000  0.00  0.00           C+0
HETATM    3  C   UNK     0       6.327  -0.363   0.000  0.00  0.00           C+0
HETATM    4  C   UNK     0       7.320   0.815   0.000  0.00  0.00           C+0
HETATM    5  O   UNK     0       8.313   1.992   0.000  0.00  0.00           O+0
HETATM    6  C   UNK     0       8.836   0.544   0.000  0.00  0.00           C+0
HETATM    7  C   UNK     0       9.359  -0.905   0.000  0.00  0.00           C+0
HETATM    8  C   UNK     0      10.875  -1.176   0.000  0.00  0.00           C+0
HETATM    9  H   UNK     0      10.506   0.319   0.000  0.00  0.00           H+0
HETATM   10  C   UNK     0      11.399  -2.624   0.000  0.00  0.00           C+0
HETATM   11  C   UNK     0      12.070  -4.010   0.000  0.00  0.00           C+0
HETATM   12  C   UNK     0      12.938  -2.574   0.000  0.00  0.00           C+0
HETATM   13  C   UNK     0      14.454  -2.845   0.000  0.00  0.00           C+0
HETATM   14  C   UNK     0      14.977  -4.294   0.000  0.00  0.00           C+0
HETATM   15  C   UNK     0      15.446  -1.668   0.000  0.00  0.00           C+0
HETATM   16  H   UNK     0      15.970  -3.116   0.000  0.00  0.00           H+0
HETATM   17  O   UNK     0      14.923  -0.220   0.000  0.00  0.00           O+0
HETATM   18  C   UNK     0      15.916   0.958   0.000  0.00  0.00           C+0
HETATM   19  C   UNK     0      17.432   0.687   0.000  0.00  0.00           C+0
HETATM   20  C   UNK     0      18.425   1.864   0.000  0.00  0.00           C+0
HETATM   21  C   UNK     0      17.955  -0.762   0.000  0.00  0.00           C+0
HETATM   22  C   UNK     0      19.471  -1.033   0.000  0.00  0.00           C+0
HETATM   23  C   UNK     0      16.962  -1.939   0.000  0.00  0.00           C+0
HETATM   24  O   UNK     0      15.393   2.406   0.000  0.00  0.00           O+0
HETATM   25  O   UNK     0      12.827  -4.110   0.000  0.00  0.00           O+0
HETATM   26  C   UNK     0      13.366  -1.095   0.000  0.00  0.00           C+0
HETATM   27  C   UNK     0      12.091  -0.231   0.000  0.00  0.00           C+0
HETATM   28  H   UNK     0       9.883  -2.353   0.000  0.00  0.00           H+0
HETATM   29  C   UNK     0       8.367  -2.082   0.000  0.00  0.00           C+0
HETATM   30  H   UNK     0       7.843  -0.634   0.000  0.00  0.00           H+0
HETATM   31  C   UNK     0       8.890  -3.531   0.000  0.00  0.00           C+0
HETATM   32  C   UNK     0      10.406  -3.802   0.000  0.00  0.00           C+0
HETATM   33  O   UNK     0      10.929  -5.250   0.000  0.00  0.00           O+0
HETATM   34  O   UNK     0       5.804   1.086   0.000  0.00  0.00           O+0
HETATM   35  C   UNK     0       4.811  -0.092   0.000  0.00  0.00           C+0
HETATM   36  C   UNK     0       3.819  -1.269   0.000  0.00  0.00           C+0
HETATM   37  C   UNK     0       4.342  -2.717   0.000  0.00  0.00           C+0
HETATM   38  C   UNK     0       5.858  -2.988   0.000  0.00  0.00           C+0
HETATM   39  O   UNK     0       6.381  -4.437   0.000  0.00  0.00           O+0
CONECT    1    2                                                            
CONECT    2    1    3   29   38                                             
CONECT    3    2    4   34   35                                             
CONECT    4    3    5    6                                                  
CONECT    5    4    6                                                       
CONECT    6    4    5    7                                                  
CONECT    7    6    8   28   29                                             
CONECT    8    7    9   10   27                                             
CONECT    9    8                                                            
CONECT   10    8   11   12   32                                             
CONECT   11   10                                                            
CONECT   12   10   13   25   26                                             
CONECT   13   12   14   15                                                  
CONECT   14   13                                                            
CONECT   15   13   16   17   23                                             
CONECT   16   15                                                            
CONECT   17   15   18                                                       
CONECT   18   17   19   24                                                  
CONECT   19   18   20   21                                                  
CONECT   20   19                                                            
CONECT   21   19   22   23                                                  
CONECT   22   21                                                            
CONECT   23   21   15                                                       
CONECT   24   18                                                            
CONECT   25   12                                                            
CONECT   26   12   27                                                       
CONECT   27   26    8                                                       
CONECT   28    7                                                            
CONECT   29    7    2   30   31                                             
CONECT   30   29                                                            
CONECT   31   29   32                                                       
CONECT   32   31   10   33                                                  
CONECT   33   32                                                            
CONECT   34    3                                                            
CONECT   35    3   36                                                       
CONECT   36   35   37                                                       
CONECT   37   36   38                                                       
CONECT   38   37    2   39                                                  
CONECT   39   38                                                            
MASTER        0    0    0    0    0    0    0    0   39    0   88    0
END

View in JSmol

Synonyms

Not Available

Chemical Formula

C₂₈H₃₆O₇

Average Mass

484.5890 Da

Monoisotopic Mass

484.24610 Da

IUPAC Name

Not Available

Traditional Name

Not Available

CAS Registry Number

Not Available

SMILES

[H][C@@]12CC[C@](O)([C@H](C)[C@]3([H])CC(C)=C(C)C(=O)O3)[C@@]1(C)C(=O)C[C@@]1([H])[C@@]2([H])[C@@H]2O[C@@H]2[C@@]2(O)CC=CC(=O)[C@]12C

InChI Identifier

InChI=1S/C28H36O7/c1-13-11-18(34-24(31)14(13)2)15(3)27(32)10-8-16-21-17(12-20(30)25(16,27)4)26(5)19(29)7-6-9-28(26,33)23-22(21)35-23/h6-7,15-18,21-23,32-33H,8-12H2,1-5H3/t15-,16+,17+,18+,21+,22+,23+,25-,26+,27+,28+/m1/s1

InChI Key

DASIIWZHZVHTSC-NAPILNLDSA-N

Experimental Spectra

Spectrum Type	Description	Depositor Email	Depositor Organization	Depositor	Deposition Date	View
1D_DEPT NMR	¹³C NMR Spectrum (1D, 151 MHz, CDCl3, experimental)	kibrom.gebreheiwot@aau.edu.et	Not Available	Not Available	2024-05-11	View Spectrum
NOESY NMR	[¹H, ¹H] NMR Spectrum (2D, 601 MHz, CDCl3, experimental)	kibrom.gebreheiwot@aau.edu.et	Not Available	Not Available	2023-04-04	View Spectrum
HMBC NMR	[¹H, ¹³C] NMR Spectrum (2D, 601 MHz, CDCl3, experimental)	kibrom.gebreheiwot@aau.edu.et	Not Available	Not Available	2023-04-04	View Spectrum
HSQC NMR	[¹H, ¹³C] NMR Spectrum (2D, 601 MHz, CDCl3, experimental)	kibrom.gebreheiwot@aau.edu.et	Not Available	Not Available	2023-04-04	View Spectrum
COSY NMR	[¹H, ¹H] NMR Spectrum (2D, 601 MHz, CDCl3, experimental)	kibrom.gebreheiwot@aau.edu.et	Not Available	Not Available	2023-04-04	View Spectrum
1D NMR	¹³C NMR Spectrum (1D, 151 MHz, CDCl3, experimental)	kibrom.gebreheiwot@aau.edu.et	Not Available	Not Available	2023-04-04	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 600 MHz, CDCl3, experimental)	kibrom.gebreheiwot@aau.edu.et	Not Available	Not Available	2023-04-04	View Spectrum
1D NMR	¹H NMR Spectrum (1D, 601 MHz, CDCl3, experimental)	kibrom.gebreheiwot@aau.edu.et	Not Available	Not Available	2023-04-04	View Spectrum

Predicted Spectra

Spectrum Type	Description	Depositor ID	Depositor Organization	Depositor	Deposition Date	View

Chemical Shift Submissions

Not Available

Species

Species of Origin

Species Name	Source	Reference
penninervium		Not Available

Chemical Taxonomy

Description

Belongs to the class of organic compounds known as withanolides and derivatives. These are c28 steroids structurally characterized by an ergostane skeleton usually functionalized at carbons 1, 22 and 26 to form a lactone ring.

Kingdom

Organic compounds

Super Class

Lipids and lipid-like molecules

Class

Steroids and steroid derivatives

Sub Class

Steroid lactones

Direct Parent

Withanolides and derivatives

Alternative Parents

Substituents

Withanolide-skeleton
Cyclohexenone
Oxepane
Dihydropyranone
Pyran
Alpha,beta-unsaturated carboxylic ester
Enoate ester
Tertiary alcohol
Cyclic alcohol
Lactone
Ketone
Carboxylic acid ester
Oxacycle
Organoheterocyclic compound
Monocarboxylic acid or derivatives
Ether
Oxirane
Dialkyl ether
Carboxylic acid derivative
Organic oxygen compound
Organic oxide
Hydrocarbon derivative
Organooxygen compound
Carbonyl group
Alcohol
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

151572

KEGG Compound ID

Not Available

BioCyc ID

Not Available

BiGG ID

Not Available

Wikipedia Link

Not Available

METLIN ID

Not Available

PubChem Compound

173667

PDB ID

Not Available

ChEBI ID

Not Available

Good Scents ID

Not Available

References

General References

Bedane KG, Desta MA, Spiteller P: Withanolides from Discopodium penninervium. Fitoterapia. 2023 Jun;167:105478. doi: 10.1016/j.fitote.2023.105478. Epub 2023 Mar 24. [PubMed:36965582 ]

Showing NP-Card for 12-oxowithanolide (NP0331576)

MOL for NP0331576 (12-oxowithanolide)

3D MOL for NP0331576 (12-oxowithanolide)

3D SDF for NP0331576 (12-oxowithanolide)

3D-SDF for NP0331576 (12-oxowithanolide)

PDB for NP0331576 (12-oxowithanolide)

3D PDB for NP0331576 (12-oxowithanolide)

SMILES for NP0331576 (12-oxowithanolide)

INCHI for NP0331576 (12-oxowithanolide)

Structure for NP0331576 (12-oxowithanolide)

3D Structure for NP0331576 (12-oxowithanolide)