1187-42-4 2,3-Diaminomaleonitrile 2-Butenedinitrile, 2,3-diamino-, (2Z)- 2-Butenedinitrile, 2,3-diamino-, (Z)- (9CI) 54414-88-9 CCRIS 921 DIAMINOMALEONITRILE EINECS 214-697-6 Hydrogen cyanide tetramer Maleonitrile, diamino- (8CI) NSC 266758