(1R,2R)-1-[(3,4-Dimethoxyphenyl)methyl]-2-[3-[(5-hydroxypentyl)oxy]-3-oxopropyl]-6,7-dimethoxy-2-methyl-1,2,3,4-tetrahydroisoquinolinium (as per EP):(1R,2R)-1,2,3,4-Tetrahydro-2-(9-hydroxy-3-oxo-4-oxanonyl)-6,7-dimethoxy-2-methyl-1-veratrylisoquinolinium (as per USP);Cisatracurium cis-Quaternary alcohol;;;,Cisatracurium Impurity