Chemical Name: (1R,1`R,2R,2`S)-2,2`-[Pentane-1,5-diylbis[oxy(3-oxopropane-3,1-diyl)]]bis[1-[(3,4-dimethoxyphenyl)-methyl]-6,7-dimethoxy-2-methyl-1,2,3,4-tetrahydroisoquinolinium] Dibenzenesulfonate (as per EP); (1R,1′R,2R,2′S)-2,2′-(3,11-Dioxo-4,10-dioxatridecamethylene)bis(1,2,3,4-tetrahydro-6,7-dimethoxy-2-methyl-1-veratrylisoquinolinium) Dibenzenesulfonate (as per USP)