1,1-Bis(4-chlorophenyl)ethylene 1,1-Bis(p-chlorophenyl)ethene 1,1-Bis(p-chlorophenyl)ethylene 2642-81-1 Benzene, 1,1'-ethenylidenebis(4-chloro- (9CI) DDNU DDNU (VAN) DMC ethylene Ethylene, 1,1-bis(p-chlorophenyl)- (8CI) NSC 2366 unsym-Bis(p-chlorophenyl)ethylene