(1,1'-Biphenyl)-4-butanoic acid, 4'-bromo-alpha,gamma-dioxo- 4'-Bromo-alpha,gamma-dioxo-(1,1'-biphenyl)-4-butanoic acid 4-(4'-Bromo(1,1'-biphenyl)-4-yl)-2,4-dioxobutanoic acid 4-Bbdb 82760-77-8