NP-MRD: Showing NP-Card for 3-[(3,3-dimethyloxiran-2-yl)methyl]-4-hydroxy-7-methoxy-1-methylquinolin-2-one (NP0286133)

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Record Information

Version

2.0

Created at

2022-09-09 14:34:57 UTC

Updated at

2022-09-09 14:34:57 UTC

NP-MRD ID

NP0286133

Secondary Accession Numbers

None

Natural Product Identification

Common Name

3-[(3,3-dimethyloxiran-2-yl)methyl]-4-hydroxy-7-methoxy-1-methylquinolin-2-one

Description

3-[(3,3-Dimethyloxiran-2-yl)methyl]-4-hydroxy-7-methoxy-1-methyl-1,2-dihydroquinolin-2-one belongs to the class of organic compounds known as hydroxyquinolones. Hydroxyquinolones are compounds containing a quinoline moiety bearing a hydroxyl group and a ketone. Quinoline or benzo[b]pyridine is a bicyclic compound that consists of benzene fused to a pyridine. 3-[(3,3-dimethyloxiran-2-yl)methyl]-4-hydroxy-7-methoxy-1-methylquinolin-2-one is found in Toddalia asiatica. 3-[(3,3-Dimethyloxiran-2-yl)methyl]-4-hydroxy-7-methoxy-1-methyl-1,2-dihydroquinolin-2-one is an extremely weak basic (essentially neutral) compound (based on its pKa).

Structure

MOL 3D MOL SDF PDB SMILES InChI

     RDKit          3D

 40 42  0  0  0  0  0  0  0  0999 V2000
    6.2918   -0.9848    0.1365 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.1903   -0.8621   -0.7247 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.9396   -0.4285   -0.3032 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.7254   -0.0918    1.0121 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.5042    0.3474    1.5063 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4517    0.4495    0.6223 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.1990    0.8741    1.0062 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0772    1.2247    2.3056 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.8737    0.9763    0.0994 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.2204    1.4310    0.5250 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.9923    0.3493    1.2425 C   0  0  1  0  0  0  0  0  0  0  0  0
   -4.3117    0.8453    1.6490 O   0  0  0  0  0  0  0  0  0  0  0  0
   -4.1476   -0.2172    0.6253 C   0  0  0  0  0  0  0  0  0  0  0  0
   -4.6413   -1.5777    1.1270 C   0  0  0  0  0  0  0  0  0  0  0  0
   -4.5963    0.2161   -0.7491 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.6049    0.6270   -1.2015 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.5569    0.7073   -2.0517 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.6051    0.2125   -1.5951 N   0  0  0  0  0  0  0  0  0  0  0  0
    0.7976   -0.1347   -2.9857 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.6168    0.1195   -0.7265 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.8667   -0.3138   -1.1535 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.0186   -1.7478    0.9184 H   0  0  0  0  0  0  0  0  0  0  0  0
    6.4604   -0.0288    0.6988 H   0  0  0  0  0  0  0  0  0  0  0  0
    7.1871   -1.2595   -0.4222 H   0  0  0  0  0  0  0  0  0  0  0  0
    4.5518   -0.1693    1.7189 H   0  0  0  0  0  0  0  0  0  0  0  0
    2.3652    0.6046    2.5363 H   0  0  0  0  0  0  0  0  0  0  0  0
    0.6044    1.1893    3.0232 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.0631    2.3120    1.2162 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.7267    1.8473   -0.3511 H   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4902   -0.0837    2.1117 H   0  0  0  0  0  0  0  0  0  0  0  0
   -3.8404   -2.3442    1.0156 H   0  0  0  0  0  0  0  0  0  0  0  0
   -5.5650   -1.8813    0.5750 H   0  0  0  0  0  0  0  0  0  0  0  0
   -4.8820   -1.5345    2.2080 H   0  0  0  0  0  0  0  0  0  0  0  0
   -4.5828    1.2924   -0.9117 H   0  0  0  0  0  0  0  0  0  0  0  0
   -5.6688   -0.1222   -0.8828 H   0  0  0  0  0  0  0  0  0  0  0  0
   -4.0504   -0.3219   -1.5488 H   0  0  0  0  0  0  0  0  0  0  0  0
   -0.1554   -0.0758   -3.5563 H   0  0  0  0  0  0  0  0  0  0  0  0
    1.4841    0.6044   -3.4276 H   0  0  0  0  0  0  0  0  0  0  0  0
    1.1935   -1.1809   -3.0939 H   0  0  0  0  0  0  0  0  0  0  0  0
    2.9939   -0.5704   -2.1938 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  7  1  0
  7  8  1  0
  7  9  2  0
  9 10  1  0
 10 11  1  0
 11 12  1  0
 12 13  1  0
 13 14  1  0
 13 15  1  0
  9 16  1  0
 16 17  2  0
 16 18  1  0
 18 19  1  0
 18 20  1  0
 20 21  2  0
 21  3  1  0
 20  6  1  0
 13 11  1  0
  1 22  1  0
  1 23  1  0
  1 24  1  0
  4 25  1  0
  5 26  1  0
  8 27  1  0
 10 28  1  0
 10 29  1  0
 11 30  1  1
 14 31  1  0
 14 32  1  0
 14 33  1  0
 15 34  1  0
 15 35  1  0
 15 36  1  0
 19 37  1  0
 19 38  1  0
 19 39  1  0
 21 40  1  0
M  END


  Mrv1533004161505382D          

 21 23  0  0  0  0            999 V2000
    0.0000   -2.4750    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000   -1.6500    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
    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
    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
    3.5724   -0.4125    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
    4.2868    0.8250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.8743    1.5395    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    4.6993    1.5395    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.0480    2.2872    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.5212    1.4676    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
    2.8579   -1.6500    0.0000 N   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
    2.1434   -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
    2.8579    0.8250    0.0000 O   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
  6  7  1  0  0  0  0
  7  8  2  0  0  0  0
  8  9  1  0  0  0  0
  9 10  1  0  0  0  0
 10 11  1  0  0  0  0
 11 12  1  0  0  0  0
 10 12  1  0  0  0  0
 12 13  1  0  0  0  0
 12 14  1  0  0  0  0
  8 15  1  0  0  0  0
 15 16  2  0  0  0  0
 15 17  1  0  0  0  0
 17 18  1  0  0  0  0
 17 19  1  0  0  0  0
  6 19  1  0  0  0  0
 19 20  2  0  0  0  0
  3 20  1  0  0  0  0
  7 21  1  0  0  0  0
M  END
> <DATABASE_ID>
NP0286133

> <DATABASE_NAME>
NP-MRD

> <SMILES>
COC1=CC=C2C(O)=C(CC3OC3(C)C)C(=O)N(C)C2=C1

> <INCHI_IDENTIFIER>
InChI=1S/C16H19NO4/c1-16(2)13(21-16)8-11-14(18)10-6-5-9(20-4)7-12(10)17(3)15(11)19/h5-7,13,18H,8H2,1-4H3

> <INCHI_KEY>
STGARIOMBWEGBP-UHFFFAOYSA-N

> <FORMULA>
C16H19NO4

> <MOLECULAR_WEIGHT>
289.331

> <EXACT_MASS>
289.131408096

> <JCHEM_ACCEPTOR_COUNT>
4

> <JCHEM_ATOM_COUNT>
40

> <JCHEM_AVERAGE_POLARIZABILITY>
30.5943682133655

> <JCHEM_BIOAVAILABILITY>
1

> <JCHEM_DONOR_COUNT>
1

> <JCHEM_FORMAL_CHARGE>
0

> <JCHEM_GHOSE_FILTER>
1

> <JCHEM_IUPAC>
3-[(3,3-dimethyloxiran-2-yl)methyl]-4-hydroxy-7-methoxy-1-methyl-1,2-dihydroquinolin-2-one

> <ALOGPS_LOGP>
1.43

> <JCHEM_LOGP>
1.1819511066666668

> <ALOGPS_LOGS>
-2.71

> <JCHEM_MDDR_LIKE_RULE>
0

> <JCHEM_NUMBER_OF_RINGS>
3

> <JCHEM_PHYSIOLOGICAL_CHARGE>
0

> <JCHEM_PKA_STRONGEST_ACIDIC>
7.363025034349813

> <JCHEM_PKA_STRONGEST_BASIC>
-0.9847230045632233

> <JCHEM_POLAR_SURFACE_AREA>
62.3

> <JCHEM_REFRACTIVITY>
79.14680000000001

> <JCHEM_ROTATABLE_BOND_COUNT>
3

> <JCHEM_RULE_OF_FIVE>
1

> <ALOGPS_SOLUBILITY>
5.60e-01 g/l

> <JCHEM_TRADITIONAL_IUPAC>
3-[(3,3-dimethyloxiran-2-yl)methyl]-4-hydroxy-7-methoxy-1-methylquinolin-2-one

> <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       0.000  -4.620   0.000  0.00  0.00           C+0
HETATM    2  O   UNK     0       0.000  -3.080   0.000  0.00  0.00           O+0
HETATM    3  C   UNK     0       1.334  -2.310   0.000  0.00  0.00           C+0
HETATM    4  C   UNK     0       1.334  -0.770   0.000  0.00  0.00           C+0
HETATM    5  C   UNK     0       2.667   0.000   0.000  0.00  0.00           C+0
HETATM    6  C   UNK     0       4.001  -0.770   0.000  0.00  0.00           C+0
HETATM    7  C   UNK     0       5.335   0.000   0.000  0.00  0.00           C+0
HETATM    8  C   UNK     0       6.668  -0.770   0.000  0.00  0.00           C+0
HETATM    9  C   UNK     0       8.002  -0.000   0.000  0.00  0.00           C+0
HETATM   10  C   UNK     0       8.002   1.540   0.000  0.00  0.00           C+0
HETATM   11  O   UNK     0       7.232   2.874   0.000  0.00  0.00           O+0
HETATM   12  C   UNK     0       8.772   2.874   0.000  0.00  0.00           C+0
HETATM   13  C   UNK     0       9.423   4.269   0.000  0.00  0.00           C+0
HETATM   14  C   UNK     0      10.306   2.739   0.000  0.00  0.00           C+0
HETATM   15  C   UNK     0       6.668  -2.310   0.000  0.00  0.00           C+0
HETATM   16  O   UNK     0       8.002  -3.080   0.000  0.00  0.00           O+0
HETATM   17  N   UNK     0       5.335  -3.080   0.000  0.00  0.00           N+0
HETATM   18  C   UNK     0       5.335  -4.620   0.000  0.00  0.00           C+0
HETATM   19  C   UNK     0       4.001  -2.310   0.000  0.00  0.00           C+0
HETATM   20  C   UNK     0       2.667  -3.080   0.000  0.00  0.00           C+0
HETATM   21  O   UNK     0       5.335   1.540   0.000  0.00  0.00           O+0
CONECT    1    2                                                            
CONECT    2    1    3                                                       
CONECT    3    2    4   20                                                  
CONECT    4    3    5                                                       
CONECT    5    4    6                                                       
CONECT    6    5    7   19                                                  
CONECT    7    6    8   21                                                  
CONECT    8    7    9   15                                                  
CONECT    9    8   10                                                       
CONECT   10    9   11   12                                                  
CONECT   11   10   12                                                       
CONECT   12   11   10   13   14                                             
CONECT   13   12                                                            
CONECT   14   12                                                            
CONECT   15    8   16   17                                                  
CONECT   16   15                                                            
CONECT   17   15   18   19                                                  
CONECT   18   17                                                            
CONECT   19   17    6   20                                                  
CONECT   20   19    3                                                       
CONECT   21    7                                                            
MASTER        0    0    0    0    0    0    0    0   21    0   46    0
END

View in JSmol

Synonyms

Not Available

Chemical Formula

C₁₆H₁₉NO₄

Average Mass

289.3310 Da

Monoisotopic Mass

289.13141 Da

IUPAC Name

3-[(3,3-dimethyloxiran-2-yl)methyl]-4-hydroxy-7-methoxy-1-methyl-1,2-dihydroquinolin-2-one

Traditional Name

3-[(3,3-dimethyloxiran-2-yl)methyl]-4-hydroxy-7-methoxy-1-methylquinolin-2-one

CAS Registry Number

Not Available

SMILES

COC1=CC=C2C(O)=C(CC3OC3(C)C)C(=O)N(C)C2=C1

InChI Identifier

InChI=1S/C16H19NO4/c1-16(2)13(21-16)8-11-14(18)10-6-5-9(20-4)7-12(10)17(3)15(11)19/h5-7,13,18H,8H2,1-4H3

InChI Key

STGARIOMBWEGBP-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

Species Name	Source	Reference
Toddalia asiatica	LOTUS Database	35616633

Chemical Taxonomy

Description

Belongs to the class of organic compounds known as hydroxyquinolones. Hydroxyquinolones are compounds containing a quinoline moiety bearing a hydroxyl group and a ketone. Quinoline or benzo[b]pyridine is a bicyclic compound that consists of benzene fused to a pyridine.

Kingdom

Organic compounds

Super Class

Organoheterocyclic compounds

Class

Quinolines and derivatives

Sub Class

Quinolones and derivatives

Direct Parent

Hydroxyquinolones

Alternative Parents

Substituents

Hydroxyquinolone
Dihydroquinolone
Hydroxyquinoline
Dihydroquinoline
Anisole
Alkyl aryl ether
Hydroxypyridine
Pyridinone
Pyridine
Benzenoid
Heteroaromatic compound
Vinylogous acid
Lactam
Oxacycle
Ether
Oxirane
Dialkyl ether
Azacycle
Organic oxygen compound
Organic nitrogen compound
Organooxygen compound
Organonitrogen compound
Hydrocarbon derivative
Organic oxide
Organopnictogen compound
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	1.43	ALOGPS
logP	1.18	ChemAxon
logS	-2.7	ALOGPS
pKa (Strongest Acidic)	7.36	ChemAxon
pKa (Strongest Basic)	-0.98	ChemAxon
Physiological Charge	0	ChemAxon
Hydrogen Acceptor Count	4	ChemAxon
Hydrogen Donor Count	1	ChemAxon
Polar Surface Area	62.3 Å²	ChemAxon
Rotatable Bond Count	3	ChemAxon
Refractivity	79.15 m³·mol⁻¹	ChemAxon
Polarizability	30.59 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

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

54706346

PDB ID

Not Available

ChEBI ID

Not Available

Good Scents ID

Not Available

References

General References

LOTUS database [Link]

Showing NP-Card for 3-[(3,3-dimethyloxiran-2-yl)methyl]-4-hydroxy-7-methoxy-1-methylquinolin-2-one (NP0286133)

MOL for NP0286133 (3-[(3,3-dimethyloxiran-2-yl)methyl]-4-hydroxy-7-methoxy-1-methylquinolin-2-one)

3D MOL for NP0286133 (3-[(3,3-dimethyloxiran-2-yl)methyl]-4-hydroxy-7-methoxy-1-methylquinolin-2-one)

3D SDF for NP0286133 (3-[(3,3-dimethyloxiran-2-yl)methyl]-4-hydroxy-7-methoxy-1-methylquinolin-2-one)

3D-SDF for NP0286133 (3-[(3,3-dimethyloxiran-2-yl)methyl]-4-hydroxy-7-methoxy-1-methylquinolin-2-one)

PDB for NP0286133 (3-[(3,3-dimethyloxiran-2-yl)methyl]-4-hydroxy-7-methoxy-1-methylquinolin-2-one)

3D PDB for NP0286133 (3-[(3,3-dimethyloxiran-2-yl)methyl]-4-hydroxy-7-methoxy-1-methylquinolin-2-one)

SMILES for NP0286133 (3-[(3,3-dimethyloxiran-2-yl)methyl]-4-hydroxy-7-methoxy-1-methylquinolin-2-one)

INCHI for NP0286133 (3-[(3,3-dimethyloxiran-2-yl)methyl]-4-hydroxy-7-methoxy-1-methylquinolin-2-one)

Structure for NP0286133 (3-[(3,3-dimethyloxiran-2-yl)methyl]-4-hydroxy-7-methoxy-1-methylquinolin-2-one)

3D Structure for NP0286133 (3-[(3,3-dimethyloxiran-2-yl)methyl]-4-hydroxy-7-methoxy-1-methylquinolin-2-one)