68213-91-2

Einecs 269-274-9 5-Hydroxy-4-((o-nitrophenyl)azo)-1-phenylpyrazole-3-carboxylic acid, ethyl ester ethyl 4,5-dihydro-4-[(2-nitrophenyl)azo]-5-oxo-1-phenyl-1H-pyrazole-3-carboxylate 4,5-Dihydro-4-[(2-nitrophenyl)azo]-5-oxo-1-phenyl-1H-pyrazole-3-carboxylic acid ethyl ester 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-4-((2-nitrophenyl)azo)-5-oxo-1-phenyl-, ethyl ester 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-4-(2-(2-nitrophenyl)diazenyl)-5-oxo-1-phenyl-, ethyl ester