3-(2-(5,6-Diphenyl-2,5-dihydro-1,2,4-triazin-3-yl)hydrazino)-1-phenyl-2-propenyl phenyl sulfide 5,6-Diphenyl-3-(2-(3-phenyl-3-(phenylthio)-1-propenyl)hydrazino)-2,5-dihydro-1,2,4-triazine AIDS-137080 AIDS137080 NSC640628