(Methylenebis(p-phenylene)bis(2-oxoethylene))bis((2-hydroxyethyl)dimethylammonium bromide) 64049-80-5 AMMONIUM, (METHYLENEBIS(p-PHENYLENE)BIS(2-OXOETHYLENE))BIS((2-HYDROXYETHYL)DIMET Ammonium, (methylenebis(p-phenylene)bis(2-oxoethylene))bis((2-hydroxyethyl)dimethyl-, dibromide