2,2'-((Methylimino)diethylene)bis(2-thiopseudourea) trihydrobromide 99670-03-8 Pseudourea, 2,2'-((methylamino)diethylene)bis(2-thio-, trihydrobromide Pseudourea, 2,2'-((methylimino)diethylene)bis(2-thio-, trihydrobromide S,2-Di(isothiuroniumethyl)methylamine dibromide hydrobromide