40374-51-4 50698-75-4 AMMONIUM, (4,4'-BIPHENYLYLENEBIS(2-OXOETHYLENE))BIS((2-ACETOXYETHYL)DIMETHYL-, D AcHc-3(2) Acetyl-seco-hemicholinium-3 Acetylseco hemicholinium-3-bromide Ammonium, (4,4'-biphenylylenebis(2-oxoethylene))bis((2-acetoxyethyl)dimethyl-, dibromide