2-Picolinium, 1,1'-[4,4'-biphenylylenebis(2-oxoethylene)]di-, dibromide 20275-19-8 NSC152436 Pyridinium, 1,1'-[[1,1'-biphenyl]-4,4'-diylbis(2-oxo-2,1-ethanediyl)]bis[2-methyl-, dibromide