NP-MRD: Showing NP-Card for (2s)-5,7-dimethoxy-2-(4-methoxyphenyl)-2,3-dihydro-1-benzopyran-4-one (NP0280978)

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Record Information

Version

2.0

Created at

2022-09-09 07:03:49 UTC

Updated at

2022-09-09 07:03:49 UTC

NP-MRD ID

NP0280978

Secondary Accession Numbers

None

Natural Product Identification

Common Name

(2s)-5,7-dimethoxy-2-(4-methoxyphenyl)-2,3-dihydro-1-benzopyran-4-one

Description

SCHEMBL18106040 belongs to the class of organic compounds known as 7-o-methylated flavonoids. These are flavonoids with methoxy groups attached to the C7 atom of the flavonoid backbone. (2s)-5,7-dimethoxy-2-(4-methoxyphenyl)-2,3-dihydro-1-benzopyran-4-one is found in Dahlia tenuicaulis and Goniothalamus gardneri. Based on a literature review very few articles have been published on SCHEMBL18106040.

Structure

MOL 3D MOL SDF PDB SMILES InChI

     RDKit          3D

 41 43  0  0  0  0  0  0  0  0999 V2000
    7.3363    0.1814   -0.7337 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.4904   -0.5904    0.0965 O   0  0  0  0  0  0  0  0  0  0  0  0
    5.1173   -0.3346    0.0789 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.5789    0.6376   -0.7171 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.2275    0.8548   -0.7031 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.3787    0.1229    0.0914 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.9213    0.4002    0.0674 C   0  0  2  0  0  0  0  0  0  0  0  0
    0.4653    1.1563    1.2923 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.9634    1.5081    1.0804 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.4756    2.5972    1.3682 O   0  0  0  0  0  0  0  0  0  0  0  0
   -1.8363    0.4826    0.4822 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.1990    0.6212    0.4371 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.7494    1.7667    0.9755 O   0  0  0  0  0  0  0  0  0  0  0  0
   -5.1531    1.9213    0.9350 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.9553   -0.3782   -0.1377 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.3984   -1.5197   -0.6734 C   0  0  0  0  0  0  0  0  0  0  0  0
   -4.1887   -2.5274   -1.2555 O   0  0  0  0  0  0  0  0  0  0  0  0
   -5.5958   -2.3611   -1.2899 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.0263   -1.6310   -0.6136 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.2256   -0.6392   -0.0389 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.1596   -0.7878    0.0030 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.9127   -0.8529    0.8913 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.2780   -1.0756    0.8802 C   0  0  0  0  0  0  0  0  0  0  0  0
    7.3050    1.2604   -0.4274 H   0  0  0  0  0  0  0  0  0  0  0  0
    8.3802   -0.1858   -0.6590 H   0  0  0  0  0  0  0  0  0  0  0  0
    7.0416    0.1005   -1.8015 H   0  0  0  0  0  0  0  0  0  0  0  0
    5.2503    1.2250   -1.3532 H   0  0  0  0  0  0  0  0  0  0  0  0
    2.8005    1.6206   -1.3296 H   0  0  0  0  0  0  0  0  0  0  0  0
    0.6755    1.0082   -0.8136 H   0  0  0  0  0  0  0  0  0  0  0  0
    1.0883    2.0354    1.5074 H   0  0  0  0  0  0  0  0  0  0  0  0
    0.4806    0.4160    2.1370 H   0  0  0  0  0  0  0  0  0  0  0  0
   -5.5843    1.2157    1.6873 H   0  0  0  0  0  0  0  0  0  0  0  0
   -5.5867    1.6971   -0.0592 H   0  0  0  0  0  0  0  0  0  0  0  0
   -5.4490    2.9807    1.1560 H   0  0  0  0  0  0  0  0  0  0  0  0
   -5.0386   -0.2646   -0.1719 H   0  0  0  0  0  0  0  0  0  0  0  0
   -6.1244   -3.2734   -1.5642 H   0  0  0  0  0  0  0  0  0  0  0  0
   -5.8774   -1.4786   -1.8945 H   0  0  0  0  0  0  0  0  0  0  0  0
   -5.9047   -2.1092   -0.2358 H   0  0  0  0  0  0  0  0  0  0  0  0
   -1.5605   -2.5115   -1.0238 H   0  0  0  0  0  0  0  0  0  0  0  0
    2.2664   -1.4445    1.5273 H   0  0  0  0  0  0  0  0  0  0  0  0
    4.7381   -1.8444    1.5042 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  2  0
  6 22  1  0
 22 23  2  0
  6  7  1  0
  7  8  1  0
  8  9  1  0
  9 10  2  0
  9 11  1  0
 11 12  2  0
 12 13  1  0
 13 14  1  0
 12 15  1  0
 15 16  2  0
 16 17  1  0
 17 18  1  0
 16 19  1  0
 19 20  2  0
 20 21  1  0
 23  3  1  0
 21  7  1  0
 20 11  1  0
  1 24  1  0
  1 25  1  0
  1 26  1  0
  4 27  1  0
  5 28  1  0
 22 40  1  0
 23 41  1  0
  7 29  1  6
  8 30  1  0
  8 31  1  0
 14 32  1  0
 14 33  1  0
 14 34  1  0
 15 35  1  0
 18 36  1  0
 18 37  1  0
 18 38  1  0
 19 39  1  0
M  END


  Mrv1652309092209032D          

 23 25  0  0  1  0            999 V2000
   -2.1434   -3.7125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.1434   -2.8875    0.0000 O   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
   -1.4289   -1.6500    0.0000 C   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
    0.0000   -1.6500    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.7145   -1.2375    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    0.7145   -0.4125    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
    1.4289    0.8250    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
    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 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
    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 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.2868   -1.6500    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    4.2868   -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
    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 O   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  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  2  0  0  0  0
  7  6  1  6  0  0  0
  7  8  1  0  0  0  0
  8  9  1  0  0  0  0
  9 10  2  0  0  0  0
  9 11  1  0  0  0  0
 11 12  2  0  0  0  0
 12 13  1  0  0  0  0
 13 14  1  0  0  0  0
 12 15  1  0  0  0  0
 15 16  2  0  0  0  0
 16 17  1  0  0  0  0
 17 18  1  0  0  0  0
 16 19  1  0  0  0  0
 19 20  2  0  0  0  0
 11 20  1  0  0  0  0
 20 21  1  0  0  0  0
  7 21  1  0  0  0  0
  6 22  1  0  0  0  0
 22 23  2  0  0  0  0
  3 23  1  0  0  0  0
M  END
> <DATABASE_ID>
NP0280978

> <DATABASE_NAME>
NP-MRD

> <SMILES>
COC1=CC=C(C=C1)[C@@H]1CC(=O)C2=C(OC)C=C(OC)C=C2O1

> <INCHI_IDENTIFIER>
InChI=1S/C18H18O5/c1-20-12-6-4-11(5-7-12)15-10-14(19)18-16(22-3)8-13(21-2)9-17(18)23-15/h4-9,15H,10H2,1-3H3/t15-/m0/s1

> <INCHI_KEY>
MQFSCAHSIUPLSB-HNNXBMFYSA-N

> <FORMULA>
C18H18O5

> <MOLECULAR_WEIGHT>
314.337

> <EXACT_MASS>
314.11542368

> <JCHEM_ACCEPTOR_COUNT>
5

> <JCHEM_ATOM_COUNT>
41

> <JCHEM_AVERAGE_POLARIZABILITY>
33.525535424506586

> <JCHEM_BIOAVAILABILITY>
1

> <JCHEM_DONOR_COUNT>
0

> <JCHEM_FORMAL_CHARGE>
0

> <JCHEM_GHOSE_FILTER>
1

> <JCHEM_IUPAC>
(2S)-5,7-dimethoxy-2-(4-methoxyphenyl)-3,4-dihydro-2H-1-benzopyran-4-one

> <JCHEM_LOGP>
2.6227902183333334

> <JCHEM_MDDR_LIKE_RULE>
0

> <JCHEM_NUMBER_OF_RINGS>
3

> <JCHEM_PHYSIOLOGICAL_CHARGE>
0

> <JCHEM_PKA_STRONGEST_ACIDIC>
14.264041918732282

> <JCHEM_PKA_STRONGEST_BASIC>
-4.277986904850021

> <JCHEM_POLAR_SURFACE_AREA>
53.99000000000001

> <JCHEM_REFRACTIVITY>
84.73670000000001

> <JCHEM_ROTATABLE_BOND_COUNT>
4

> <JCHEM_RULE_OF_FIVE>
1

> <JCHEM_TRADITIONAL_IUPAC>
(2S)-5,7-dimethoxy-2-(4-methoxyphenyl)-2,3-dihydro-1-benzopyran-4-one

> <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      -4.001  -6.930   0.000  0.00  0.00           C+0
HETATM    2  O   UNK     0      -4.001  -5.390   0.000  0.00  0.00           O+0
HETATM    3  C   UNK     0      -2.667  -4.620   0.000  0.00  0.00           C+0
HETATM    4  C   UNK     0      -2.667  -3.080   0.000  0.00  0.00           C+0
HETATM    5  C   UNK     0      -1.334  -2.310   0.000  0.00  0.00           C+0
HETATM    6  C   UNK     0       0.000  -3.080   0.000  0.00  0.00           C+0
HETATM    7  C   UNK     0       1.334  -2.310   0.000  0.00  0.00           C+0
HETATM    8  C   UNK     0       1.334  -0.770   0.000  0.00  0.00           C+0
HETATM    9  C   UNK     0       2.667   0.000   0.000  0.00  0.00           C+0
HETATM   10  O   UNK     0       2.667   1.540   0.000  0.00  0.00           O+0
HETATM   11  C   UNK     0       4.001  -0.770   0.000  0.00  0.00           C+0
HETATM   12  C   UNK     0       5.335   0.000   0.000  0.00  0.00           C+0
HETATM   13  O   UNK     0       5.335   1.540   0.000  0.00  0.00           O+0
HETATM   14  C   UNK     0       4.001   2.310   0.000  0.00  0.00           C+0
HETATM   15  C   UNK     0       6.668  -0.770   0.000  0.00  0.00           C+0
HETATM   16  C   UNK     0       6.668  -2.310   0.000  0.00  0.00           C+0
HETATM   17  O   UNK     0       8.002  -3.080   0.000  0.00  0.00           O+0
HETATM   18  C   UNK     0       8.002  -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  C   UNK     0       4.001  -2.310   0.000  0.00  0.00           C+0
HETATM   21  O   UNK     0       2.667  -3.080   0.000  0.00  0.00           O+0
HETATM   22  C   UNK     0       0.000  -4.620   0.000  0.00  0.00           C+0
HETATM   23  C   UNK     0      -1.334  -5.390   0.000  0.00  0.00           C+0
CONECT    1    2                                                            
CONECT    2    1    3                                                       
CONECT    3    2    4   23                                                  
CONECT    4    3    5                                                       
CONECT    5    4    6                                                       
CONECT    6    5    7   22                                                  
CONECT    7    6    8   21                                                  
CONECT    8    7    9                                                       
CONECT    9    8   10   11                                                  
CONECT   10    9                                                            
CONECT   11    9   12   20                                                  
CONECT   12   11   13   15                                                  
CONECT   13   12   14                                                       
CONECT   14   13                                                            
CONECT   15   12   16                                                       
CONECT   16   15   17   19                                                  
CONECT   17   16   18                                                       
CONECT   18   17                                                            
CONECT   19   16   20                                                       
CONECT   20   19   11   21                                                  
CONECT   21   20    7                                                       
CONECT   22    6   23                                                       
CONECT   23   22    3                                                       
MASTER        0    0    0    0    0    0    0    0   23    0   50    0
END

View in JSmol

Synonyms

Not Available

Chemical Formula

C₁₈H₁₈O₅

Average Mass

314.3370 Da

Monoisotopic Mass

314.11542 Da

IUPAC Name

(2S)-5,7-dimethoxy-2-(4-methoxyphenyl)-3,4-dihydro-2H-1-benzopyran-4-one

Traditional Name

(2S)-5,7-dimethoxy-2-(4-methoxyphenyl)-2,3-dihydro-1-benzopyran-4-one

CAS Registry Number

Not Available

SMILES

COC1=CC=C(C=C1)[C@@H]1CC(=O)C2=C(OC)C=C(OC)C=C2O1

InChI Identifier

InChI=1S/C18H18O5/c1-20-12-6-4-11(5-7-12)15-10-14(19)18-16(22-3)8-13(21-2)9-17(18)23-15/h4-9,15H,10H2,1-3H3/t15-/m0/s1

InChI Key

MQFSCAHSIUPLSB-HNNXBMFYSA-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
Dahlia tenuicaulis	LOTUS Database	35616633
Goniothalamus gardneri	LOTUS Database	35616633

Chemical Taxonomy

Description

Belongs to the class of organic compounds known as 7-o-methylated flavonoids. These are flavonoids with methoxy groups attached to the C7 atom of the flavonoid backbone.

Kingdom

Organic compounds

Super Class

Phenylpropanoids and polyketides

Class

Flavonoids

Sub Class

O-methylated flavonoids

Direct Parent

7-O-methylated flavonoids

Alternative Parents

Substituents

4p-methoxyflavonoid-skeleton
5-methoxyflavonoid-skeleton
7-methoxyflavonoid-skeleton
Flavanone
Flavan
Chromone
Chromane
1-benzopyran
Benzopyran
Phenoxy compound
Methoxybenzene
Anisole
Aryl alkyl ketone
Aryl ketone
Phenol ether
Alkyl aryl ether
Monocyclic benzene moiety
Benzenoid
Ketone
Organoheterocyclic compound
Oxacycle
Ether
Organooxygen compound
Organic oxide
Organic oxygen compound
Hydrocarbon derivative
Aromatic heteropolycyclic compound

Molecular Framework

Aromatic 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
logP	2.62	ChemAxon
pKa (Strongest Acidic)	14.26	ChemAxon
pKa (Strongest Basic)	-4.3	ChemAxon
Physiological Charge	0	ChemAxon
Hydrogen Acceptor Count	5	ChemAxon
Hydrogen Donor Count	0	ChemAxon
Polar Surface Area	53.99 Å²	ChemAxon
Rotatable Bond Count	4	ChemAxon
Refractivity	84.74 m³·mol⁻¹	ChemAxon
Polarizability	33.53 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

28424332

KEGG Compound ID

Not Available

BioCyc ID

Not Available

BiGG ID

Not Available

Wikipedia Link

Not Available

METLIN ID

Not Available

PubChem Compound

57404369

PDB ID

Not Available

ChEBI ID

Not Available

Good Scents ID

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References

General References

LOTUS database [Link]

Showing NP-Card for (2s)-5,7-dimethoxy-2-(4-methoxyphenyl)-2,3-dihydro-1-benzopyran-4-one (NP0280978)

MOL for NP0280978 ((2s)-5,7-dimethoxy-2-(4-methoxyphenyl)-2,3-dihydro-1-benzopyran-4-one)

3D MOL for NP0280978 ((2s)-5,7-dimethoxy-2-(4-methoxyphenyl)-2,3-dihydro-1-benzopyran-4-one)

3D SDF for NP0280978 ((2s)-5,7-dimethoxy-2-(4-methoxyphenyl)-2,3-dihydro-1-benzopyran-4-one)

3D-SDF for NP0280978 ((2s)-5,7-dimethoxy-2-(4-methoxyphenyl)-2,3-dihydro-1-benzopyran-4-one)

PDB for NP0280978 ((2s)-5,7-dimethoxy-2-(4-methoxyphenyl)-2,3-dihydro-1-benzopyran-4-one)

3D PDB for NP0280978 ((2s)-5,7-dimethoxy-2-(4-methoxyphenyl)-2,3-dihydro-1-benzopyran-4-one)

SMILES for NP0280978 ((2s)-5,7-dimethoxy-2-(4-methoxyphenyl)-2,3-dihydro-1-benzopyran-4-one)

INCHI for NP0280978 ((2s)-5,7-dimethoxy-2-(4-methoxyphenyl)-2,3-dihydro-1-benzopyran-4-one)

Structure for NP0280978 ((2s)-5,7-dimethoxy-2-(4-methoxyphenyl)-2,3-dihydro-1-benzopyran-4-one)

3D Structure for NP0280978 ((2s)-5,7-dimethoxy-2-(4-methoxyphenyl)-2,3-dihydro-1-benzopyran-4-one)