3-(2-(3-((2-Methylphenyl)thio)-3-phenyl-1-propenyl)hydrazino)-5,6-diphenyl-2,5-dihydro-1,2,4-triazine 3-(2-(5,6-Diphenyl-2,5-dihydro-1,2,4-triazin-3-yl)hydrazino)-1-phenyl-2-propenyl 2-methylphenyl sulfide AIDS-137082 AIDS137082 NSC640630