N '-(1,1-Dioxo-tetrahydrothiophen-3-yl)-

N '-(1,1-DIOXO-TETRAHYDROTHIOPHEN-3-YL)-N,N-DIMETHYL-ETHANE-1,2-DIAMINE

N '-(1,1-DIOXO-TETRAHYDRO-1-THIOPHEN-3-YL)-N , N-DIMETHYL-ETHANE-1,2-DIAMINE

N'-(1,1-DIOXO-TETRAHYDRO-1LAMBDA6-THIOPHEN-3-YL)-N,N-DIMETHYL-ETHANE-1,2-DIAMINE