Synonyms: Carbonicacid, dithio-, cyclic S,S-dicyanovinylene ester (6CI); Carbonic acid, dithio-,cyclic S,S-ester with 2,3-dimercapto-2-butenedinitrile (8CI); Carbonic acid,dithio-, cyclic S,S-ester with dimercaptomaleonitrile (7CI); 2-Butenedinitrile,2,3-dimercapto-, cyclic dithiocarbonate (8CI); 4,5-Dicyano-1,3-dithiolen-2-one