2-((3-(2-(5,6-Diphenyl-2,5-dihydro-1,2,4-triazin-3-yl)hydrazino)-1-methyl-2-propenyl)thio)aniline 2-((3-(2-(5,6-Diphenyl-2,5-dihydro-1,2,4-triazin-3-yl)hydrazino)-1-methyl-2-propenyl)thio)phenylamine AIDS-137087 AIDS137087 NSC640639