4,7-Methano-1H-isoindole-1,3(2H)-dione, 2,2'-(1,2-ethanediyl)bis(5,6-dibromohexahydro- 41291-34-3 52907-07-0 56449-81-1 BN 451 Citex BN 451 EINECS 258-250-3 Ethylenebis(5,6-dibromonorbornane-2,3-dicarboximide) N,N'-(Ethylene)bis(4,5-dibromohexahydro-3,6-methanophthalimide) Saytex BN 451