4-(2-(Methanesulfonamido)ethyl)phenylhydrazine sulfate 65665-49-8 Bis(N-(2-(4-hydrazinophenyl)ethyl)methanesulphonamide) sulphate EINECS 265-865-0 Methanesulfonamide, N-(2-(4-hydrazinophenyl)ethyl)-, sulfate (2:1)