2',(2')'-Dibenzylideneoxalohydrazide 6629-10-3 BG 1 EINECS 229-617-5 Ethanedioic acid, bis((phenylmethylene)hydrazide) N,N'-Dibenzal(oxalyl dihydrazide) N,N'-Dibenzal(oxalyl dihydrozide) NSC 56213 Oxalic acid, bis(benzylidenehydrazide)