NP-MRD: Showing NP-Card for 1-(3-hydroxy-6-methylheptan-2-yl)-9a,11a-dimethyl-1h,2h,3h,3ah,3bh,4h,6h,7h,8h,9h,9bh,10h,11h-cyclopenta[a]phenanthrene-6,7-diol (NP0217697)

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Record Information

Version

2.0

Created at

2022-09-05 18:07:34 UTC

Updated at

2022-09-05 18:07:34 UTC

NP-MRD ID

NP0217697

Secondary Accession Numbers

None

Natural Product Identification

Common Name

1-(3-hydroxy-6-methylheptan-2-yl)-9a,11a-dimethyl-1h,2h,3h,3ah,3bh,4h,6h,7h,8h,9h,9bh,10h,11h-cyclopenta[a]phenanthrene-6,7-diol

Description

14-(3-Hydroxy-6-methylheptan-2-yl)-2,15-dimethyltetracyclo[8.7.0.0²,⁷.0¹¹,¹⁵]Heptadec-7-ene-5,6-diol belongs to the class of organic compounds known as trihydroxy bile acids, alcohols and derivatives. These are prenol lipids structurally characterized by a bile acid or alcohol which bears three hydroxyl groups. 1-(3-hydroxy-6-methylheptan-2-yl)-9a,11a-dimethyl-1h,2h,3h,3ah,3bh,4h,6h,7h,8h,9h,9bh,10h,11h-cyclopenta[a]phenanthrene-6,7-diol is found in Aglaia rubiginosa. 14-(3-Hydroxy-6-methylheptan-2-yl)-2,15-dimethyltetracyclo[8.7.0.0²,⁷.0¹¹,¹⁵]Heptadec-7-ene-5,6-diol is an extremely weak basic (essentially neutral) compound (based on its pKa).

Structure

MOL SDF PDB SMILES InChI


  Mrv1533004161504332D          

 30 33  0  0  0  0            999 V2000
    6.9960   -2.0886    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    7.7104   -2.5011    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    7.7104   -3.3261    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    8.4249   -2.0886    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    9.1394   -2.5011    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    9.8538   -2.0886    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    9.8538   -1.2636    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   10.5683   -2.5011    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   10.5683   -3.3261    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   11.2828   -2.0886    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   11.3690   -1.2682    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   12.1760   -1.0966    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   12.5885   -1.8111    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   13.3955   -1.9826    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   13.9475   -1.3695    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   14.7545   -1.5411    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   15.0094   -2.3257    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   15.8164   -2.4972    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   16.3684   -1.8841    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   16.0713   -3.2818    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   16.8783   -3.4534    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   15.5193   -3.8949    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   14.7123   -3.7234    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   14.4574   -2.9388    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   13.9053   -3.5519    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   13.6504   -2.7673    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   13.0984   -3.3803    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   12.2914   -3.2088    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   12.0365   -2.4242    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   11.4234   -2.9762    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
  2  4  1  0  0  0  0
  4  5  1  0  0  0  0
  5  6  1  0  0  0  0
  6  7  1  0  0  0  0
  6  8  1  0  0  0  0
  8  9  1  0  0  0  0
  8 10  1  0  0  0  0
 10 11  1  0  0  0  0
 11 12  1  0  0  0  0
 12 13  1  0  0  0  0
 13 14  1  0  0  0  0
 14 15  1  0  0  0  0
 15 16  1  0  0  0  0
 16 17  2  0  0  0  0
 17 18  1  0  0  0  0
 18 19  1  0  0  0  0
 18 20  1  0  0  0  0
 20 21  1  0  0  0  0
 20 22  1  0  0  0  0
 22 23  1  0  0  0  0
 23 24  1  0  0  0  0
 17 24  1  0  0  0  0
 24 25  1  0  0  0  0
 24 26  1  0  0  0  0
 14 26  1  0  0  0  0
 26 27  1  0  0  0  0
 27 28  1  0  0  0  0
 28 29  1  0  0  0  0
 10 29  1  0  0  0  0
 13 29  1  0  0  0  0
 29 30  1  0  0  0  0
M  END


  Mrv1533004161504332D          

 30 33  0  0  0  0            999 V2000
    6.9960   -2.0886    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    7.7104   -2.5011    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    7.7104   -3.3261    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    8.4249   -2.0886    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    9.1394   -2.5011    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    9.8538   -2.0886    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    9.8538   -1.2636    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   10.5683   -2.5011    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   10.5683   -3.3261    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   11.2828   -2.0886    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   11.3690   -1.2682    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   12.1760   -1.0966    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   12.5885   -1.8111    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   13.3955   -1.9826    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   13.9475   -1.3695    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   14.7545   -1.5411    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   15.0094   -2.3257    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   15.8164   -2.4972    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   16.3684   -1.8841    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   16.0713   -3.2818    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   16.8783   -3.4534    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   15.5193   -3.8949    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   14.7123   -3.7234    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   14.4574   -2.9388    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   13.9053   -3.5519    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   13.6504   -2.7673    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   13.0984   -3.3803    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   12.2914   -3.2088    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   12.0365   -2.4242    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   11.4234   -2.9762    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
  2  4  1  0  0  0  0
  4  5  1  0  0  0  0
  5  6  1  0  0  0  0
  6  7  1  0  0  0  0
  6  8  1  0  0  0  0
  8  9  1  0  0  0  0
  8 10  1  0  0  0  0
 10 11  1  0  0  0  0
 11 12  1  0  0  0  0
 12 13  1  0  0  0  0
 13 14  1  0  0  0  0
 14 15  1  0  0  0  0
 15 16  1  0  0  0  0
 16 17  2  0  0  0  0
 17 18  1  0  0  0  0
 18 19  1  0  0  0  0
 18 20  1  0  0  0  0
 20 21  1  0  0  0  0
 20 22  1  0  0  0  0
 22 23  1  0  0  0  0
 23 24  1  0  0  0  0
 17 24  1  0  0  0  0
 24 25  1  0  0  0  0
 24 26  1  0  0  0  0
 14 26  1  0  0  0  0
 26 27  1  0  0  0  0
 27 28  1  0  0  0  0
 28 29  1  0  0  0  0
 10 29  1  0  0  0  0
 13 29  1  0  0  0  0
 29 30  1  0  0  0  0
M  END
> <DATABASE_ID>
NP0217697

> <DATABASE_NAME>
NP-MRD

> <SMILES>
CC(C)CCC(O)C(C)C1CCC2C3CC=C4C(O)C(O)CCC4(C)C3CCC12C

> <INCHI_IDENTIFIER>
InChI=1S/C27H46O3/c1-16(2)6-11-23(28)17(3)19-9-10-20-18-7-8-22-25(30)24(29)13-15-27(22,5)21(18)12-14-26(19,20)4/h8,16-21,23-25,28-30H,6-7,9-15H2,1-5H3

> <INCHI_KEY>
ZSNZJJYKGGJXRT-UHFFFAOYSA-N

> <FORMULA>
C27H46O3

> <MOLECULAR_WEIGHT>
418.662

> <EXACT_MASS>
418.344695341

> <JCHEM_ACCEPTOR_COUNT>
3

> <JCHEM_ATOM_COUNT>
76

> <JCHEM_AVERAGE_POLARIZABILITY>
51.66877385146246

> <JCHEM_BIOAVAILABILITY>
1

> <JCHEM_DONOR_COUNT>
3

> <JCHEM_FORMAL_CHARGE>
0

> <JCHEM_GHOSE_FILTER>
0

> <JCHEM_IUPAC>
14-(3-hydroxy-6-methylheptan-2-yl)-2,15-dimethyltetracyclo[8.7.0.0²,⁷.0¹¹,¹⁵]heptadec-7-ene-5,6-diol

> <ALOGPS_LOGP>
4.83

> <JCHEM_LOGP>
4.885128086666667

> <ALOGPS_LOGS>
-4.76

> <JCHEM_MDDR_LIKE_RULE>
0

> <JCHEM_NUMBER_OF_RINGS>
4

> <JCHEM_PHYSIOLOGICAL_CHARGE>
0

> <JCHEM_PKA>
15.091528494110477

> <JCHEM_PKA_STRONGEST_ACIDIC>
13.500174362553967

> <JCHEM_PKA_STRONGEST_BASIC>
-0.8401855525489791

> <JCHEM_POLAR_SURFACE_AREA>
60.69

> <JCHEM_REFRACTIVITY>
123.41649999999997

> <JCHEM_ROTATABLE_BOND_COUNT>
5

> <JCHEM_RULE_OF_FIVE>
1

> <ALOGPS_SOLUBILITY>
7.34e-03 g/l

> <JCHEM_TRADITIONAL_IUPAC>
14-(3-hydroxy-6-methylheptan-2-yl)-2,15-dimethyltetracyclo[8.7.0.0²,⁷.0¹¹,¹⁵]heptadec-7-ene-5,6-diol

> <JCHEM_VEBER_RULE>
0

$$$$

HEADER    PROTEIN                                 16-APR-15   NONE
TITLE     NULL                                                        
COMPND    NULL                                                        
SOURCE    NULL                                                        
KEYWDS    NULL                                                        
EXPDTA    NULL                                                        
AUTHOR    Marvin                                                      
REVDAT   1   16-APR-15         0                                  
HETATM    1  C   UNK     0      13.059  -3.899   0.000  0.00  0.00           C+0
HETATM    2  C   UNK     0      14.393  -4.669   0.000  0.00  0.00           C+0
HETATM    3  C   UNK     0      14.393  -6.209   0.000  0.00  0.00           C+0
HETATM    4  C   UNK     0      15.726  -3.899   0.000  0.00  0.00           C+0
HETATM    5  C   UNK     0      17.060  -4.669   0.000  0.00  0.00           C+0
HETATM    6  C   UNK     0      18.394  -3.899   0.000  0.00  0.00           C+0
HETATM    7  O   UNK     0      18.394  -2.359   0.000  0.00  0.00           O+0
HETATM    8  C   UNK     0      19.728  -4.669   0.000  0.00  0.00           C+0
HETATM    9  C   UNK     0      19.728  -6.209   0.000  0.00  0.00           C+0
HETATM   10  C   UNK     0      21.061  -3.899   0.000  0.00  0.00           C+0
HETATM   11  C   UNK     0      21.222  -2.367   0.000  0.00  0.00           C+0
HETATM   12  C   UNK     0      22.729  -2.047   0.000  0.00  0.00           C+0
HETATM   13  C   UNK     0      23.499  -3.381   0.000  0.00  0.00           C+0
HETATM   14  C   UNK     0      25.005  -3.701   0.000  0.00  0.00           C+0
HETATM   15  C   UNK     0      26.035  -2.556   0.000  0.00  0.00           C+0
HETATM   16  C   UNK     0      27.542  -2.877   0.000  0.00  0.00           C+0
HETATM   17  C   UNK     0      28.018  -4.341   0.000  0.00  0.00           C+0
HETATM   18  C   UNK     0      29.524  -4.661   0.000  0.00  0.00           C+0
HETATM   19  O   UNK     0      30.554  -3.517   0.000  0.00  0.00           O+0
HETATM   20  C   UNK     0      30.000  -6.126   0.000  0.00  0.00           C+0
HETATM   21  O   UNK     0      31.506  -6.446   0.000  0.00  0.00           O+0
HETATM   22  C   UNK     0      28.969  -7.271   0.000  0.00  0.00           C+0
HETATM   23  C   UNK     0      27.463  -6.950   0.000  0.00  0.00           C+0
HETATM   24  C   UNK     0      26.987  -5.486   0.000  0.00  0.00           C+0
HETATM   25  C   UNK     0      25.957  -6.630   0.000  0.00  0.00           C+0
HETATM   26  C   UNK     0      25.481  -5.166   0.000  0.00  0.00           C+0
HETATM   27  C   UNK     0      24.450  -6.310   0.000  0.00  0.00           C+0
HETATM   28  C   UNK     0      22.944  -5.990   0.000  0.00  0.00           C+0
HETATM   29  C   UNK     0      22.468  -4.525   0.000  0.00  0.00           C+0
HETATM   30  C   UNK     0      21.324  -5.556   0.000  0.00  0.00           C+0
CONECT    1    2                                                            
CONECT    2    1    3    4                                                  
CONECT    3    2                                                            
CONECT    4    2    5                                                       
CONECT    5    4    6                                                       
CONECT    6    5    7    8                                                  
CONECT    7    6                                                            
CONECT    8    6    9   10                                                  
CONECT    9    8                                                            
CONECT   10    8   11   29                                                  
CONECT   11   10   12                                                       
CONECT   12   11   13                                                       
CONECT   13   12   14   29                                                  
CONECT   14   13   15   26                                                  
CONECT   15   14   16                                                       
CONECT   16   15   17                                                       
CONECT   17   16   18   24                                                  
CONECT   18   17   19   20                                                  
CONECT   19   18                                                            
CONECT   20   18   21   22                                                  
CONECT   21   20                                                            
CONECT   22   20   23                                                       
CONECT   23   22   24                                                       
CONECT   24   23   17   25   26                                             
CONECT   25   24                                                            
CONECT   26   24   14   27                                                  
CONECT   27   26   28                                                       
CONECT   28   27   29                                                       
CONECT   29   28   10   13   30                                             
CONECT   30   29                                                            
MASTER        0    0    0    0    0    0    0    0   30    0   66    0
END

View in JSmol

Synonyms

Not Available

Chemical Formula

C₂₇H₄₆O₃

Average Mass

418.6620 Da

Monoisotopic Mass

418.34470 Da

IUPAC Name

14-(3-hydroxy-6-methylheptan-2-yl)-2,15-dimethyltetracyclo[8.7.0.0²,⁷.0¹¹,¹⁵]heptadec-7-ene-5,6-diol

Traditional Name

14-(3-hydroxy-6-methylheptan-2-yl)-2,15-dimethyltetracyclo[8.7.0.0²,⁷.0¹¹,¹⁵]heptadec-7-ene-5,6-diol

CAS Registry Number

Not Available

SMILES

CC(C)CCC(O)C(C)C1CCC2C3CC=C4C(O)C(O)CCC4(C)C3CCC12C

InChI Identifier

InChI=1S/C27H46O3/c1-16(2)6-11-23(28)17(3)19-9-10-20-18-7-8-22-25(30)24(29)13-15-27(22,5)21(18)12-14-26(19,20)4/h8,16-21,23-25,28-30H,6-7,9-15H2,1-5H3

InChI Key

ZSNZJJYKGGJXRT-UHFFFAOYSA-N

Experimental Spectra

Not Available

Predicted Spectra

Not Available

Chemical Shift Submissions

Not Available

Species

Species of Origin

Species Name	Source	Reference
Aglaia rubiginosa	LOTUS Database	35616633

Chemical Taxonomy

Description

Belongs to the class of organic compounds known as trihydroxy bile acids, alcohols and derivatives. These are prenol lipids structurally characterized by a bile acid or alcohol which bears three hydroxyl groups.

Kingdom

Organic compounds

Super Class

Lipids and lipid-like molecules

Class

Steroids and steroid derivatives

Sub Class

Bile acids, alcohols and derivatives

Direct Parent

Trihydroxy bile acids, alcohols and derivatives

Alternative Parents

Substituents

Cholesterol
Cholesterol-skeleton
Cholestane-skeleton
Trihydroxy bile acid, alcohol, or derivatives
22-hydroxysteroid
3-hydroxy-delta-5-steroid
3-hydroxysteroid
4-hydroxysteroid
Hydroxysteroid
Delta-5-steroid
Cyclic alcohol
Secondary alcohol
Hydrocarbon derivative
Organic oxygen compound
Alcohol
Organooxygen compound
Aliphatic homopolycyclic compound

Molecular Framework

Aliphatic 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	4.83	ALOGPS
logP	4.89	ChemAxon
logS	-4.8	ALOGPS
pKa (Strongest Acidic)	13.5	ChemAxon
pKa (Strongest Basic)	-0.84	ChemAxon
Physiological Charge	0	ChemAxon
Hydrogen Acceptor Count	3	ChemAxon
Hydrogen Donor Count	3	ChemAxon
Polar Surface Area	60.69 Å²	ChemAxon
Rotatable Bond Count	5	ChemAxon
Refractivity	123.42 m³·mol⁻¹	ChemAxon
Polarizability	51.67 Å³	ChemAxon
Number of Rings	4	ChemAxon
Bioavailability	Yes	ChemAxon
Rule of Five	Yes	ChemAxon
Ghose Filter	No	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

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

85276020

PDB ID

Not Available

ChEBI ID

Not Available

Good Scents ID

Not Available

References

General References

LOTUS database [Link]

Showing NP-Card for 1-(3-hydroxy-6-methylheptan-2-yl)-9a,11a-dimethyl-1h,2h,3h,3ah,3bh,4h,6h,7h,8h,9h,9bh,10h,11h-cyclopenta[a]phenanthrene-6,7-diol (NP0217697)

MOL for NP0217697 (1-(3-hydroxy-6-methylheptan-2-yl)-9a,11a-dimethyl-1h,2h,3h,3ah,3bh,4h,6h,7h,8h,9h,9bh,10h,11h-cyclopenta[a]phenanthrene-6,7-diol)

3D MOL for NP0217697 (1-(3-hydroxy-6-methylheptan-2-yl)-9a,11a-dimethyl-1h,2h,3h,3ah,3bh,4h,6h,7h,8h,9h,9bh,10h,11h-cyclopenta[a]phenanthrene-6,7-diol)

3D SDF for NP0217697 (1-(3-hydroxy-6-methylheptan-2-yl)-9a,11a-dimethyl-1h,2h,3h,3ah,3bh,4h,6h,7h,8h,9h,9bh,10h,11h-cyclopenta[a]phenanthrene-6,7-diol)

3D-SDF for NP0217697 (1-(3-hydroxy-6-methylheptan-2-yl)-9a,11a-dimethyl-1h,2h,3h,3ah,3bh,4h,6h,7h,8h,9h,9bh,10h,11h-cyclopenta[a]phenanthrene-6,7-diol)

PDB for NP0217697 (1-(3-hydroxy-6-methylheptan-2-yl)-9a,11a-dimethyl-1h,2h,3h,3ah,3bh,4h,6h,7h,8h,9h,9bh,10h,11h-cyclopenta[a]phenanthrene-6,7-diol)

3D PDB for NP0217697 (1-(3-hydroxy-6-methylheptan-2-yl)-9a,11a-dimethyl-1h,2h,3h,3ah,3bh,4h,6h,7h,8h,9h,9bh,10h,11h-cyclopenta[a]phenanthrene-6,7-diol)

SMILES for NP0217697 (1-(3-hydroxy-6-methylheptan-2-yl)-9a,11a-dimethyl-1h,2h,3h,3ah,3bh,4h,6h,7h,8h,9h,9bh,10h,11h-cyclopenta[a]phenanthrene-6,7-diol)

INCHI for NP0217697 (1-(3-hydroxy-6-methylheptan-2-yl)-9a,11a-dimethyl-1h,2h,3h,3ah,3bh,4h,6h,7h,8h,9h,9bh,10h,11h-cyclopenta[a]phenanthrene-6,7-diol)

Structure for NP0217697 (1-(3-hydroxy-6-methylheptan-2-yl)-9a,11a-dimethyl-1h,2h,3h,3ah,3bh,4h,6h,7h,8h,9h,9bh,10h,11h-cyclopenta[a]phenanthrene-6,7-diol)

3D Structure for NP0217697 (1-(3-hydroxy-6-methylheptan-2-yl)-9a,11a-dimethyl-1h,2h,3h,3ah,3bh,4h,6h,7h,8h,9h,9bh,10h,11h-cyclopenta[a]phenanthrene-6,7-diol)