10114-46-2 2(1H)-Quinolinone, 4-hydroxy-1-methyl-3-((4-nitrophenyl)azo)- 4-Hydroxy-1-methyl-3-((4-nitrophenyl)azo)-2-quinolone 4-Hydroxy-3-(p-nitrophenylazo)-N-methyl-2-quinolone EINECS 233-310-1