1,1'-(1,4-Phthalazinediyldiimino)bis(4-(4-bromophenyl)-3-chloro-2-azetidinone) 139108-71-7 2-Azetidinone, 1,1'-(1,4-phthalazinediyldiimino)bis(4-(4-bromophenyl)-3-chloro-