1-Thia-3,6-diazacycloheptane-2,7-dithione

1,4-Diaza-6-thiacycloheptane-5,7-dithione

N,N'-Ethylenebisthiocarbamic thioanhydride

3,4,5,6-Tetrahydro-1,3,6-thiadiazepine-2,7-dithione