2,2’-(1,1’-biphenyl)-4,4’-diylbis(2-hydroxy-4,4-dimethyl-morpholinium)dibrom 2,2’-(4,4’-biphenylylene)bis(2-hydroxy-4,4-dimethyl-morpholiniudibromide hc-3 hemicholine hemicholinium-3bromide hemicholinium-3dibromide hemicholiniumbromide hemicholiniumdibromide