NP-MRD: Showing NP-Card for 3-{2-[2-(3,4-dihydroxyphenyl)ethenyl]-3,4-dihydroxyphenyl}prop-2-enoic acid (NP0309164)

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Record Information

Version

1.0

Created at

2022-09-11 03:33:14 UTC

Updated at

2022-09-11 03:33:14 UTC

NP-MRD ID

NP0309164

Secondary Accession Numbers

None

Natural Product Identification

Common Name

3-{2-[2-(3,4-dihydroxyphenyl)ethenyl]-3,4-dihydroxyphenyl}prop-2-enoic acid

Description

SCHEMBL6535378 belongs to the class of organic compounds known as stilbenes. These are organic compounds containing a 1,2-diphenylethylene moiety. Stilbenes (C6-C2-C6 ) are derived from the common phenylpropene (C6-C3) skeleton building block. The introduction of one or more hydroxyl groups to a phenyl ring lead to stilbenoids. SCHEMBL6535378 is an extremely weak basic (essentially neutral) compound (based on its pKa).

Structure

MOL 3D MOL SDF PDB SMILES InChI

     RDKit          3D

 37 38  0  0  0  0  0  0  0  0999 V2000
   -4.6310    3.8814    0.1372 O   0  0  0  0  0  0  0  0  0  0  0  0
   -3.5633    3.2220    0.1471 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.3231    3.8273    0.1584 O   0  0  0  0  0  0  0  0  0  0  0  0
   -3.6828    1.7481    0.1461 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.5623    1.0529    0.1565 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.5866   -0.3927    0.1564 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.7916   -1.0589    0.1454 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.8243   -2.4366    0.1453 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.6487   -3.1463    0.1562 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.6657   -4.5248    0.1562 O   0  0  0  0  0  0  0  0  0  0  0  0
   -1.4188   -2.4800    0.1674 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.2746   -3.2436    0.1781 O   0  0  0  0  0  0  0  0  0  0  0  0
   -1.3737   -1.0997    0.1677 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.1440   -0.3638    0.1789 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.0606   -0.8841    0.1901 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.2876   -0.0580    0.2013 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.2265    1.3056    0.2004 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.4018    2.0770    0.2110 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.6120    1.4408    0.2224 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.7760    2.1823    0.2329 O   0  0  0  0  0  0  0  0  0  0  0  0
    4.6967    0.0599    0.2235 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.9496   -0.5272    0.2352 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.5320   -0.6896    0.2129 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.1644    4.7201    0.5670 H   0  0  0  0  0  0  0  0  0  0  0  0
   -4.6316    1.2896    0.1374 H   0  0  0  0  0  0  0  0  0  0  0  0
   -1.6429    1.6465    0.1649 H   0  0  0  0  0  0  0  0  0  0  0  0
   -4.7367   -0.5356    0.1366 H   0  0  0  0  0  0  0  0  0  0  0  0
   -4.7603   -2.9682    0.1367 H   0  0  0  0  0  0  0  0  0  0  0  0
   -1.8731   -5.0983    0.1636 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.1394   -4.2093    0.1795 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.1679    0.7309    0.1783 H   0  0  0  0  0  0  0  0  0  0  0  0
    1.2815   -1.9575    0.1925 H   0  0  0  0  0  0  0  0  0  0  0  0
    1.3129    1.8741    0.1918 H   0  0  0  0  0  0  0  0  0  0  0  0
    3.3515    3.1438    0.2103 H   0  0  0  0  0  0  0  0  0  0  0  0
    5.7111    3.1861    0.2321 H   0  0  0  0  0  0  0  0  0  0  0  0
    6.7610    0.0502    0.2426 H   0  0  0  0  0  0  0  0  0  0  0  0
    3.6461   -1.7644    0.2142 H   0  0  0  0  0  0  0  0  0  0  0  0
  3  2  1  0
  2  1  2  0
  2  4  1  0
  4  5  2  0
  5  6  1  0
  6  7  2  0
  7  8  1  0
  8  9  2  0
  9 10  1  0
  9 11  1  0
 11 12  1  0
 11 13  2  0
 13 14  1  0
 14 15  2  0
 15 16  1  0
 16 17  2  0
 17 18  1  0
 18 19  2  0
 19 20  1  0
 19 21  1  0
 21 22  1  0
 21 23  2  0
 13  6  1  0
 23 16  1  0
  3 24  1  0
  4 25  1  0
  5 26  1  0
  7 27  1  0
  8 28  1  0
 10 29  1  0
 12 30  1  0
 14 31  1  0
 15 32  1  0
 17 33  1  0
 18 34  1  0
 20 35  1  0
 22 36  1  0
 23 37  1  0
M  END


  Mrv1533004251506252D          

 23 24  0  0  0  0            999 V2000
    2.8579   -0.0000    0.0000 O   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
    1.4289    0.0000    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
    1.4289   -1.6500    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4289   -2.4750    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.1434   -2.8875    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.1434   -3.7125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4289   -4.1250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4289   -4.9500    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.7145   -3.7125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000   -4.1250    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.7145   -2.8875    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000   -2.4750    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.7145   -2.8875    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.4289   -2.4750    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.1434   -2.8875    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.8579   -2.4750    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.8579   -1.6500    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
   -2.1434   -1.2375    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.1434   -0.4125    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -1.4289   -1.6500    0.0000 C   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
  4  2  1  4  0  0  0
  4  5  2  0  0  0  0
  5  6  1  0  0  0  0
  6  7  2  0  0  0  0
  7  8  1  0  0  0  0
  8  9  2  0  0  0  0
  9 10  1  0  0  0  0
  9 11  1  0  0  0  0
 11 12  1  0  0  0  0
 11 13  2  0  0  0  0
  6 13  1  0  0  0  0
 14 13  1  4  0  0  0
 14 15  2  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  2  0  0  0  0
 19 20  1  0  0  0  0
 19 21  1  0  0  0  0
 21 22  1  0  0  0  0
 21 23  2  0  0  0  0
 16 23  1  0  0  0  0
M  END
> <DATABASE_ID>
NP0309164

> <DATABASE_NAME>
NP-MRD

> <SMILES>
OC(=O)C=CC1=CC=C(O)C(O)=C1C=CC1=CC=C(O)C(O)=C1

> <INCHI_IDENTIFIER>
InChI=1S/C17H14O6/c18-13-6-2-10(9-15(13)20)1-5-12-11(4-8-16(21)22)3-7-14(19)17(12)23/h1-9,18-20,23H,(H,21,22)

> <INCHI_KEY>
PULWRMOKQNWQBD-UHFFFAOYSA-N

> <FORMULA>
C17H14O6

> <MOLECULAR_WEIGHT>
314.293

> <EXACT_MASS>
314.079038171

> <JCHEM_ACCEPTOR_COUNT>
6

> <JCHEM_ATOM_COUNT>
37

> <JCHEM_AVERAGE_POLARIZABILITY>
31.41529511857646

> <JCHEM_BIOAVAILABILITY>
1

> <JCHEM_DONOR_COUNT>
5

> <JCHEM_FORMAL_CHARGE>
0

> <JCHEM_GHOSE_FILTER>
1

> <JCHEM_IUPAC>
3-{2-[2-(3,4-dihydroxyphenyl)ethenyl]-3,4-dihydroxyphenyl}prop-2-enoic acid

> <ALOGPS_LOGP>
2.68

> <JCHEM_LOGP>
3.2616660086666664

> <ALOGPS_LOGS>
-4.16

> <JCHEM_MDDR_LIKE_RULE>
0

> <JCHEM_NUMBER_OF_RINGS>
2

> <JCHEM_PHYSIOLOGICAL_CHARGE>
-1

> <JCHEM_PKA>
8.933408702662389

> <JCHEM_PKA_STRONGEST_ACIDIC>
3.868812319952963

> <JCHEM_PKA_STRONGEST_BASIC>
-6.2792727717155055

> <JCHEM_POLAR_SURFACE_AREA>
118.22000000000001

> <JCHEM_REFRACTIVITY>
86.43830000000001

> <JCHEM_ROTATABLE_BOND_COUNT>
4

> <JCHEM_RULE_OF_FIVE>
1

> <ALOGPS_SOLUBILITY>
2.18e-02 g/l

> <JCHEM_TRADITIONAL_IUPAC>
3-{2-[2-(3,4-dihydroxyphenyl)ethenyl]-3,4-dihydroxyphenyl}prop-2-enoic acid

> <JCHEM_VEBER_RULE>
0

$$$$

HEADER    PROTEIN                                 25-APR-15   NONE
TITLE     NULL                                                        
COMPND    NULL                                                        
SOURCE    NULL                                                        
KEYWDS    NULL                                                        
EXPDTA    NULL                                                        
AUTHOR    Marvin                                                      
REVDAT   1   25-APR-15         0                                  
HETATM    1  O   UNK     0       5.335  -0.000   0.000  0.00  0.00           O+0
HETATM    2  C   UNK     0       4.001  -0.770   0.000  0.00  0.00           C+0
HETATM    3  O   UNK     0       2.667   0.000   0.000  0.00  0.00           O+0
HETATM    4  C   UNK     0       4.001  -2.310   0.000  0.00  0.00           C+0
HETATM    5  C   UNK     0       2.667  -3.080   0.000  0.00  0.00           C+0
HETATM    6  C   UNK     0       2.667  -4.620   0.000  0.00  0.00           C+0
HETATM    7  C   UNK     0       4.001  -5.390   0.000  0.00  0.00           C+0
HETATM    8  C   UNK     0       4.001  -6.930   0.000  0.00  0.00           C+0
HETATM    9  C   UNK     0       2.667  -7.700   0.000  0.00  0.00           C+0
HETATM   10  O   UNK     0       2.667  -9.240   0.000  0.00  0.00           O+0
HETATM   11  C   UNK     0       1.334  -6.930   0.000  0.00  0.00           C+0
HETATM   12  O   UNK     0       0.000  -7.700   0.000  0.00  0.00           O+0
HETATM   13  C   UNK     0       1.334  -5.390   0.000  0.00  0.00           C+0
HETATM   14  C   UNK     0       0.000  -4.620   0.000  0.00  0.00           C+0
HETATM   15  C   UNK     0      -1.334  -5.390   0.000  0.00  0.00           C+0
HETATM   16  C   UNK     0      -2.667  -4.620   0.000  0.00  0.00           C+0
HETATM   17  C   UNK     0      -4.001  -5.390   0.000  0.00  0.00           C+0
HETATM   18  C   UNK     0      -5.335  -4.620   0.000  0.00  0.00           C+0
HETATM   19  C   UNK     0      -5.335  -3.080   0.000  0.00  0.00           C+0
HETATM   20  O   UNK     0      -6.668  -2.310   0.000  0.00  0.00           O+0
HETATM   21  C   UNK     0      -4.001  -2.310   0.000  0.00  0.00           C+0
HETATM   22  O   UNK     0      -4.001  -0.770   0.000  0.00  0.00           O+0
HETATM   23  C   UNK     0      -2.667  -3.080   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   13                                                  
CONECT    7    6    8                                                       
CONECT    8    7    9                                                       
CONECT    9    8   10   11                                                  
CONECT   10    9                                                            
CONECT   11    9   12   13                                                  
CONECT   12   11                                                            
CONECT   13   11    6   14                                                  
CONECT   14   13   15                                                       
CONECT   15   14   16                                                       
CONECT   16   15   17   23                                                  
CONECT   17   16   18                                                       
CONECT   18   17   19                                                       
CONECT   19   18   20   21                                                  
CONECT   20   19                                                            
CONECT   21   19   22   23                                                  
CONECT   22   21                                                            
CONECT   23   21   16                                                       
MASTER        0    0    0    0    0    0    0    0   23    0   48    0
END

View in JSmol

Synonyms

Value	Source
3-{2-[2-(3,4-dihydroxyphenyl)ethenyl]-3,4-dihydroxyphenyl}prop-2-enoate	Generator

Chemical Formula

C₁₇H₁₄O₆

Average Mass

314.2930 Da

Monoisotopic Mass

314.07904 Da

IUPAC Name

3-{2-[2-(3,4-dihydroxyphenyl)ethenyl]-3,4-dihydroxyphenyl}prop-2-enoic acid

Traditional Name

3-{2-[2-(3,4-dihydroxyphenyl)ethenyl]-3,4-dihydroxyphenyl}prop-2-enoic acid

CAS Registry Number

Not Available

SMILES

OC(=O)C=CC1=CC=C(O)C(O)=C1C=CC1=CC=C(O)C(O)=C1

InChI Identifier

InChI=1S/C17H14O6/c18-13-6-2-10(9-15(13)20)1-5-12-11(4-8-16(21)22)3-7-14(19)17(12)23/h1-9,18-20,23H,(H,21,22)

InChI Key

PULWRMOKQNWQBD-UHFFFAOYSA-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

Not Available

Chemical Taxonomy

Description

Belongs to the class of organic compounds known as stilbenes. These are organic compounds containing a 1,2-diphenylethylene moiety. Stilbenes (C6-C2-C6 ) are derived from the common phenylpropene (C6-C3) skeleton building block. The introduction of one or more hydroxyl groups to a phenyl ring lead to stilbenoids.

Kingdom

Organic compounds

Super Class

Phenylpropanoids and polyketides

Class

Stilbenes

Sub Class

Not Available

Direct Parent

Stilbenes

Alternative Parents

Substituents

Stilbene
Cinnamic acid
Cinnamic acid or derivatives
Coumaric acid or derivatives
Hydroxycinnamic acid
Hydroxycinnamic acid or derivatives
Catechol
Styrene
1-hydroxy-4-unsubstituted benzenoid
1-hydroxy-2-unsubstituted benzenoid
Phenol
Monocyclic benzene moiety
Benzenoid
Carboxylic acid
Carboxylic acid derivative
Monocarboxylic acid or derivatives
Hydrocarbon derivative
Organic oxide
Organic oxygen compound
Carbonyl group
Organooxygen compound
Aromatic homomonocyclic compound

Molecular Framework

Aromatic homomonocyclic 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	2.68	ALOGPS
logP	3.26	ChemAxon
logS	-4.2	ALOGPS
pKa (Strongest Acidic)	3.87	ChemAxon
pKa (Strongest Basic)	-6.3	ChemAxon
Physiological Charge	-1	ChemAxon
Hydrogen Acceptor Count	6	ChemAxon
Hydrogen Donor Count	5	ChemAxon
Polar Surface Area	118.22 Å²	ChemAxon
Rotatable Bond Count	4	ChemAxon
Refractivity	86.44 m³·mol⁻¹	ChemAxon
Polarizability	31.42 Å³	ChemAxon
Number of Rings	2	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

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

54208832

PDB ID

Not Available

ChEBI ID

Not Available

Good Scents ID

Not Available

References

General References

LOTUS database [Link]

Showing NP-Card for 3-{2-[2-(3,4-dihydroxyphenyl)ethenyl]-3,4-dihydroxyphenyl}prop-2-enoic acid (NP0309164)

MOL for NP0309164 (3-{2-[2-(3,4-dihydroxyphenyl)ethenyl]-3,4-dihydroxyphenyl}prop-2-enoic acid)

3D MOL for NP0309164 (3-{2-[2-(3,4-dihydroxyphenyl)ethenyl]-3,4-dihydroxyphenyl}prop-2-enoic acid)

3D SDF for NP0309164 (3-{2-[2-(3,4-dihydroxyphenyl)ethenyl]-3,4-dihydroxyphenyl}prop-2-enoic acid)

3D-SDF for NP0309164 (3-{2-[2-(3,4-dihydroxyphenyl)ethenyl]-3,4-dihydroxyphenyl}prop-2-enoic acid)

PDB for NP0309164 (3-{2-[2-(3,4-dihydroxyphenyl)ethenyl]-3,4-dihydroxyphenyl}prop-2-enoic acid)

3D PDB for NP0309164 (3-{2-[2-(3,4-dihydroxyphenyl)ethenyl]-3,4-dihydroxyphenyl}prop-2-enoic acid)

SMILES for NP0309164 (3-{2-[2-(3,4-dihydroxyphenyl)ethenyl]-3,4-dihydroxyphenyl}prop-2-enoic acid)

INCHI for NP0309164 (3-{2-[2-(3,4-dihydroxyphenyl)ethenyl]-3,4-dihydroxyphenyl}prop-2-enoic acid)

Structure for NP0309164 (3-{2-[2-(3,4-dihydroxyphenyl)ethenyl]-3,4-dihydroxyphenyl}prop-2-enoic acid)

3D Structure for NP0309164 (3-{2-[2-(3,4-dihydroxyphenyl)ethenyl]-3,4-dihydroxyphenyl}prop-2-enoic acid)