Atracurium besylateAtracurium besylate2,2′-[1,5-Pentanediylbis[oxy(3-oxo-3,1-propanediyl)]]bis[1-[3,4-dimethoxyphenyl)methyl]-1,2,3,4-tetrahydro-6,7-dimethoxy-2-methylisoquinolinium]dibenzenesulfonateBW-33ATracrium2,2'-[1,5-Pentanediylbis[oxy(3-oxo-3,1-propanediyl)]]bis[1-[(3,4-dimethoxyphenyl)methyl]-1,2,3,4-tetrahydro-6,7-dimethoxy-2-methyl-isoquinolinium BenzenesulfonateBW 33ATracurAtracurium DibesylateWellcome 33A74atracurium besylate