2(1H)-Quinolinone,4-hydroxy-1-methyl-3-[(4-nitrophenyl)azo]- (9CI); Carbostyril, 4-hydroxy-1-methyl-3-[(p-nitrophenyl)azo]-(8CI); 3-(4-Nitrophenylazo)-N-methyl-4-hydroxy-2-quinolone;4-Hydroxy-1-methyl-3-[(4-nitrophenyl)azo]-2-quinolone
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