5-Imino-4-((4-methoxyphenyl)diazenyl)-2-methyl-2,5-dihydro-1H-pyrazol-3-amine 5-Imino-4-((4-methoxyphenyl)diazenyl)-2-methyl-2,5-dihydro-1H-pyrazol-3-ylamine 5460-43-5 AIDS-124316 AIDS124316 NSC21681