1,4-Diamino-2,3-dicyano-1,4-bis[2-aminophenylthio]butadiene; bis[Amino[(2-aminophenyl)thio]methylene]-butanedinitrile (9CI); bis[Amino(o-aminophenylthio)methylene]-succinonitrile (6CI);2,3-Bis[amino[(2-aminophenyl)thio]methylene]butanedinitrile; U 0126; U 0156; UO126