4,4'-Biphenylenebis(3-oxopropylene)bis(dimethyl(2-hydroxyethyl)ammonium) dibromide

2-hydroxyethyl-[3-[4-[4-[2-(2-hydroxyethyl-dimethyl-ammonio)carbonylet hyl]phenyl]phenyl]propanoyl]-dimethyl-azanium dibromide