1H-Pyrazol-5(4H)-one, 4-(2-(4-methoxy-2-nitrophenyl)hydrazinylidene)-3-methyl- 4-(2-(4-Methoxy-2-nitrophenyl)hydrazinylidene)-3-methyl-1H-pyrazol-5(4H)-one 4-(4-Methoxy-2-nitrophenyl)hydrazono-3-methyl-2-pyrazolin-5-one UR0600000