1,1'-(1,1'-Biphenyl)-4,4'-diylbis(2-bromoethan-1-one) 4,4'-Bis(2-bromoacetyl)biphenyl 4072-67-7 EINECS 223-785-3 Ethanone, 1,1'-(1,1'-biphenyl)-4,4'-diylbis(2-bromo-