NP-MRD: Showing NP-Card for (5s,7s)-1,4,5,7-tetrahydroxy-2-methoxy-7-methyl-6,8-dihydro-5h-anthracene-9,10-dione (NP0289744)

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Record Information

Version

2.0

Created at

2022-09-09 20:04:51 UTC

Updated at

2022-09-09 20:04:52 UTC

NP-MRD ID

NP0289744

Secondary Accession Numbers

None

Natural Product Identification

Common Name

(5s,7s)-1,4,5,7-tetrahydroxy-2-methoxy-7-methyl-6,8-dihydro-5h-anthracene-9,10-dione

Description

(1S,3S)-Austrocortirubin belongs to the class of organic compounds known as hydroxyanthraquinones. Hydroxyanthraquinones are compounds containing a hydroxyanthraquinone moiety, which consists of an anthracene bearing a quinone, and hydroxyl group. (5s,7s)-1,4,5,7-tetrahydroxy-2-methoxy-7-methyl-6,8-dihydro-5h-anthracene-9,10-dione is found in Cortinarius. Based on a literature review very few articles have been published on (1S,3S)-Austrocortirubin.

Structure

MOL 3D MOL SDF PDB SMILES InChI

     RDKit          3D

 39 41  0  0  0  0  0  0  0  0999 V2000
    6.1198    0.8695    0.1586 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.9305    0.6851    0.8607 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.7044    0.4370    0.2462 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.5598    0.3516   -1.1112 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.3395    0.1056   -1.7043 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.1823    0.0168   -3.0855 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.1947   -0.0674   -0.9383 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.3214    0.0158    0.4433 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.5492    0.2629    1.0299 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.7125    0.3506    2.3619 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.0940   -0.1723    1.2041 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.1152   -0.1137    2.4575 O   0  0  0  0  0  0  0  0  0  0  0  0
   -1.2080   -0.4346    0.5761 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.3000   -0.5086   -0.7376 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.1036   -0.3279   -1.5407 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.1976   -0.4000   -2.8023 O   0  0  0  0  0  0  0  0  0  0  0  0
   -2.6459   -0.7756   -1.3013 C   0  0  1  0  0  0  0  0  0  0  0  0
   -3.0012   -2.0813   -0.9965 O   0  0  0  0  0  0  0  0  0  0  0  0
   -3.5868    0.2415   -0.6922 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.4964    0.3176    0.8088 C   0  0  1  0  0  0  0  0  0  0  0  0
   -3.0919    1.7202    1.2787 C   0  0  0  0  0  0  0  0  0  0  0  0
   -4.7222   -0.0123    1.3578 O   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4463   -0.6235    1.3739 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.9183    1.3419    0.7660 H   0  0  0  0  0  0  0  0  0  0  0  0
    6.5175   -0.1455   -0.1120 H   0  0  0  0  0  0  0  0  0  0  0  0
    5.9065    1.4764   -0.7488 H   0  0  0  0  0  0  0  0  0  0  0  0
    4.4320    0.4812   -1.7394 H   0  0  0  0  0  0  0  0  0  0  0  0
    2.9471    0.1261   -3.7409 H   0  0  0  0  0  0  0  0  0  0  0  0
    2.1043    0.2732    3.1002 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.6542   -0.5898   -2.3960 H   0  0  0  0  0  0  0  0  0  0  0  0
   -3.9650   -2.2536   -1.0528 H   0  0  0  0  0  0  0  0  0  0  0  0
   -4.6394    0.0698   -1.0077 H   0  0  0  0  0  0  0  0  0  0  0  0
   -3.2449    1.2401   -1.0880 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.7797    1.6033    2.3353 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.1735    1.9872    0.6863 H   0  0  0  0  0  0  0  0  0  0  0  0
   -3.8975    2.4351    1.1166 H   0  0  0  0  0  0  0  0  0  0  0  0
   -5.4627    0.4691    0.9106 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.2167   -0.3990    2.4257 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.8155   -1.6828    1.2974 H   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0
  2  3  1  0
  3  4  2  0
  4  5  1  0
  5  6  1  0
  5  7  2  0
  7 15  1  0
 15 16  2  0
 15 14  1  0
 14 13  2  0
 13 23  1  0
 23 20  1  0
 20 21  1  0
 20 22  1  1
 20 19  1  0
 19 17  1  0
 17 18  1  0
 13 11  1  0
 11 12  2  0
 11  8  1  0
  8  9  2  0
  9 10  1  0
  9  3  1  0
  8  7  1  0
 17 14  1  0
  1 24  1  0
  1 25  1  0
  1 26  1  0
  4 27  1  0
  6 28  1  0
 23 38  1  0
 23 39  1  0
 21 34  1  0
 21 35  1  0
 21 36  1  0
 22 37  1  0
 19 32  1  0
 19 33  1  0
 17 30  1  6
 18 31  1  0
 10 29  1  0
M  END


  Mrv1652309092222042D          

 23 25  0  0  1  0            999 V2000
    5.7158    0.8250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.0013    1.2375    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    4.2868    0.8250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.2868   -0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.5724   -0.4125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.5724   -1.2375    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.8579   -0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.8579    0.8250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.5724    1.2375    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.5724    2.0625    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.1434    1.2375    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.1434    2.0625    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.4289    0.8250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4289    0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.1434   -0.4125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.1434   -1.2375    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.7145   -0.4125    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    0.7145   -1.2375    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000   -0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000    0.8250    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
   -0.8125    0.6817    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.2822    1.6002    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.7145    1.2375    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  2  0  0  0  0
  4  5  1  0  0  0  0
  5  6  1  0  0  0  0
  5  7  2  0  0  0  0
  7  8  1  0  0  0  0
  8  9  2  0  0  0  0
  3  9  1  0  0  0  0
  9 10  1  0  0  0  0
  8 11  1  0  0  0  0
 11 12  2  0  0  0  0
 11 13  1  0  0  0  0
 13 14  2  0  0  0  0
 14 15  1  0  0  0  0
  7 15  1  0  0  0  0
 15 16  2  0  0  0  0
 14 17  1  0  0  0  0
 17 18  1  1  0  0  0
 17 19  1  0  0  0  0
 19 20  1  0  0  0  0
 20 21  1  6  0  0  0
 20 22  1  1  0  0  0
 20 23  1  0  0  0  0
 13 23  1  0  0  0  0
M  END
> <DATABASE_ID>
NP0289744

> <DATABASE_NAME>
NP-MRD

> <SMILES>
COC1=CC(O)=C2C(=O)C3=C(C[C@](C)(O)C[C@@H]3O)C(=O)C2=C1O

> <INCHI_IDENTIFIER>
InChI=1S/C16H16O7/c1-16(22)4-6-10(8(18)5-16)15(21)11-7(17)3-9(23-2)14(20)12(11)13(6)19/h3,8,17-18,20,22H,4-5H2,1-2H3/t8-,16-/m0/s1

> <INCHI_KEY>
DGBJOTSGQUQQJO-PWJLMRLQSA-N

> <FORMULA>
C16H16O7

> <MOLECULAR_WEIGHT>
320.297

> <EXACT_MASS>
320.089602855

> <JCHEM_ACCEPTOR_COUNT>
7

> <JCHEM_ATOM_COUNT>
39

> <JCHEM_AVERAGE_POLARIZABILITY>
31.457877595822858

> <JCHEM_BIOAVAILABILITY>
1

> <JCHEM_DONOR_COUNT>
4

> <JCHEM_FORMAL_CHARGE>
0

> <JCHEM_GHOSE_FILTER>
1

> <JCHEM_IUPAC>
(1S,3S)-1,3,5,8-tetrahydroxy-6-methoxy-3-methyl-1,2,3,4,9,10-hexahydroanthracene-9,10-dione

> <JCHEM_LOGP>
0.8362815159999992

> <JCHEM_MDDR_LIKE_RULE>
0

> <JCHEM_NUMBER_OF_RINGS>
3

> <JCHEM_PHYSIOLOGICAL_CHARGE>
0

> <JCHEM_PKA>
10.586196350240725

> <JCHEM_PKA_STRONGEST_ACIDIC>
8.63449990878238

> <JCHEM_PKA_STRONGEST_BASIC>
-2.854451080534653

> <JCHEM_POLAR_SURFACE_AREA>
124.29000000000002

> <JCHEM_REFRACTIVITY>
80.5018

> <JCHEM_ROTATABLE_BOND_COUNT>
1

> <JCHEM_RULE_OF_FIVE>
1

> <JCHEM_TRADITIONAL_IUPAC>
(5S,7S)-1,4,5,7-tetrahydroxy-2-methoxy-7-methyl-6,8-dihydro-5H-anthracene-9,10-dione

> <JCHEM_VEBER_RULE>
0

$$$$

HEADER    PROTEIN                                 09-SEP-22   NONE
TITLE     NULL                                                        
COMPND    NULL                                                        
SOURCE    NULL                                                        
KEYWDS    NULL                                                        
EXPDTA    NULL                                                        
AUTHOR    Marvin                                                      
REVDAT   1   09-SEP-22         0                                  
HETATM    1  C   UNK     0      10.669   1.540   0.000  0.00  0.00           C+0
HETATM    2  O   UNK     0       9.336   2.310   0.000  0.00  0.00           O+0
HETATM    3  C   UNK     0       8.002   1.540   0.000  0.00  0.00           C+0
HETATM    4  C   UNK     0       8.002  -0.000   0.000  0.00  0.00           C+0
HETATM    5  C   UNK     0       6.668  -0.770   0.000  0.00  0.00           C+0
HETATM    6  O   UNK     0       6.668  -2.310   0.000  0.00  0.00           O+0
HETATM    7  C   UNK     0       5.335  -0.000   0.000  0.00  0.00           C+0
HETATM    8  C   UNK     0       5.335   1.540   0.000  0.00  0.00           C+0
HETATM    9  C   UNK     0       6.668   2.310   0.000  0.00  0.00           C+0
HETATM   10  O   UNK     0       6.668   3.850   0.000  0.00  0.00           O+0
HETATM   11  C   UNK     0       4.001   2.310   0.000  0.00  0.00           C+0
HETATM   12  O   UNK     0       4.001   3.850   0.000  0.00  0.00           O+0
HETATM   13  C   UNK     0       2.667   1.540   0.000  0.00  0.00           C+0
HETATM   14  C   UNK     0       2.667   0.000   0.000  0.00  0.00           C+0
HETATM   15  C   UNK     0       4.001  -0.770   0.000  0.00  0.00           C+0
HETATM   16  O   UNK     0       4.001  -2.310   0.000  0.00  0.00           O+0
HETATM   17  C   UNK     0       1.334  -0.770   0.000  0.00  0.00           C+0
HETATM   18  O   UNK     0       1.334  -2.310   0.000  0.00  0.00           O+0
HETATM   19  C   UNK     0       0.000  -0.000   0.000  0.00  0.00           C+0
HETATM   20  C   UNK     0       0.000   1.540   0.000  0.00  0.00           C+0
HETATM   21  C   UNK     0      -1.517   1.273   0.000  0.00  0.00           C+0
HETATM   22  O   UNK     0      -0.527   2.987   0.000  0.00  0.00           O+0
HETATM   23  C   UNK     0       1.334   2.310   0.000  0.00  0.00           C+0
CONECT    1    2                                                            
CONECT    2    1    3                                                       
CONECT    3    2    4    9                                                  
CONECT    4    3    5                                                       
CONECT    5    4    6    7                                                  
CONECT    6    5                                                            
CONECT    7    5    8   15                                                  
CONECT    8    7    9   11                                                  
CONECT    9    8    3   10                                                  
CONECT   10    9                                                            
CONECT   11    8   12   13                                                  
CONECT   12   11                                                            
CONECT   13   11   14   23                                                  
CONECT   14   13   15   17                                                  
CONECT   15   14    7   16                                                  
CONECT   16   15                                                            
CONECT   17   14   18   19                                                  
CONECT   18   17                                                            
CONECT   19   17   20                                                       
CONECT   20   19   21   22   23                                             
CONECT   21   20                                                            
CONECT   22   20                                                            
CONECT   23   20   13                                                       
MASTER        0    0    0    0    0    0    0    0   23    0   50    0
END

View in JSmol

Synonyms

Value	Source
Austrocortirubin	MeSH

Chemical Formula

C₁₆H₁₆O₇

Average Mass

320.2970 Da

Monoisotopic Mass

320.08960 Da

IUPAC Name

(1S,3S)-1,3,5,8-tetrahydroxy-6-methoxy-3-methyl-1,2,3,4,9,10-hexahydroanthracene-9,10-dione

Traditional Name

(5S,7S)-1,4,5,7-tetrahydroxy-2-methoxy-7-methyl-6,8-dihydro-5H-anthracene-9,10-dione

CAS Registry Number

Not Available

SMILES

COC1=CC(O)=C2C(=O)C3=C(C[C@](C)(O)C[C@@H]3O)C(=O)C2=C1O

InChI Identifier

InChI=1S/C16H16O7/c1-16(22)4-6-10(8(18)5-16)15(21)11-7(17)3-9(23-2)14(20)12(11)13(6)19/h3,8,17-18,20,22H,4-5H2,1-2H3/t8-,16-/m0/s1

InChI Key

DGBJOTSGQUQQJO-PWJLMRLQSA-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
Cortinarius	LOTUS Database	35616633

Chemical Taxonomy

Description

Belongs to the class of organic compounds known as hydroxyanthraquinones. Hydroxyanthraquinones are compounds containing a hydroxyanthraquinone moiety, which consists of an anthracene bearing a quinone, and hydroxyl group.

Kingdom

Super Class

Class

Sub Class

Direct Parent

Hydroxyanthraquinones

Alternative Parents

Substituents

Hydroxyanthraquinone
Anisole
Quinone
Aryl ketone
1-hydroxy-2-unsubstituted benzenoid
Alkyl aryl ether
Vinylogous acid
Tertiary alcohol
Ketone
Secondary alcohol
Polyol
Ether
Alcohol
Organooxygen compound
Hydrocarbon derivative
Organic oxide
Organic oxygen compound
Aromatic homopolycyclic compound

Molecular Framework

Aromatic homopolycyclic 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	0.84	ChemAxon
pKa (Strongest Acidic)	8.63	ChemAxon
pKa (Strongest Basic)	-2.9	ChemAxon
Physiological Charge	0	ChemAxon
Hydrogen Acceptor Count	7	ChemAxon
Hydrogen Donor Count	4	ChemAxon
Polar Surface Area	124.29 Å²	ChemAxon
Rotatable Bond Count	1	ChemAxon
Refractivity	80.5 m³·mol⁻¹	ChemAxon
Polarizability	31.46 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

78440022

KEGG Compound ID

Not Available

BioCyc ID

Not Available

BiGG ID

Not Available

Wikipedia Link

Not Available

METLIN ID

Not Available

PubChem Compound

137630424

PDB ID

Not Available

ChEBI ID

Not Available

Good Scents ID

Not Available

References

General References

LOTUS database [Link]

Showing NP-Card for (5s,7s)-1,4,5,7-tetrahydroxy-2-methoxy-7-methyl-6,8-dihydro-5h-anthracene-9,10-dione (NP0289744)

MOL for NP0289744 ((5s,7s)-1,4,5,7-tetrahydroxy-2-methoxy-7-methyl-6,8-dihydro-5h-anthracene-9,10-dione)

3D MOL for NP0289744 ((5s,7s)-1,4,5,7-tetrahydroxy-2-methoxy-7-methyl-6,8-dihydro-5h-anthracene-9,10-dione)

3D SDF for NP0289744 ((5s,7s)-1,4,5,7-tetrahydroxy-2-methoxy-7-methyl-6,8-dihydro-5h-anthracene-9,10-dione)

3D-SDF for NP0289744 ((5s,7s)-1,4,5,7-tetrahydroxy-2-methoxy-7-methyl-6,8-dihydro-5h-anthracene-9,10-dione)

PDB for NP0289744 ((5s,7s)-1,4,5,7-tetrahydroxy-2-methoxy-7-methyl-6,8-dihydro-5h-anthracene-9,10-dione)

3D PDB for NP0289744 ((5s,7s)-1,4,5,7-tetrahydroxy-2-methoxy-7-methyl-6,8-dihydro-5h-anthracene-9,10-dione)

SMILES for NP0289744 ((5s,7s)-1,4,5,7-tetrahydroxy-2-methoxy-7-methyl-6,8-dihydro-5h-anthracene-9,10-dione)

INCHI for NP0289744 ((5s,7s)-1,4,5,7-tetrahydroxy-2-methoxy-7-methyl-6,8-dihydro-5h-anthracene-9,10-dione)

Structure for NP0289744 ((5s,7s)-1,4,5,7-tetrahydroxy-2-methoxy-7-methyl-6,8-dihydro-5h-anthracene-9,10-dione)

3D Structure for NP0289744 ((5s,7s)-1,4,5,7-tetrahydroxy-2-methoxy-7-methyl-6,8-dihydro-5h-anthracene-9,10-dione)