Synonyms: (4E)-5-Imino-4-[(4-methoxyphenyl)hydrazono]-4,5-dihydro-1H-pyrazol-3-amine;3,5-diiminopyrazolidin-4-one (4-methoxyphenyl)hydrazone;4-[(4-Methoxyphenyl)hydrazono]-4H-pyrazole-3,5-diamine;4H-pyrazol-4-one, 3,5-diamino-, 2-(4-methoxyphenyl)hydrazone;4H-pyrazol-4-one, 3-amino-1,5-dihydro-5-imino-, 2-(4-methoxyphenyl)hydrazone, (4E)-