英文别名:
4-[(4-chloro-2-nitrophenyl)azo]-2,4-dihydro-5-methyl-3H-pyrazol-3-one;4-(4-Chloro-2-nitrophenylazo)-3-methyl-2-pyrazolin-5-one;Einecs 238-788-5;3H-Pyrazol-3-one, 4-[2-(4-chloro-2-nitrophenyl)diazenyl]-2,4-dihydro-5-methyl-;4-[(4-chloro-2-nitrophenyl)diazenyl]-3-methyl-1,4-dihydropyrazol-5-one