1,6-Hexanediaminium, N,N'-bis(3-(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)propyl)-N,N,N',N'-tetramethyl-, dibromide 21093-51-6 Hdmppa Hexamethylenebis(dimethyl-(3-phthalimidopropyl)ammonium bromide) W 84 W-84