Cisatracurium Besylate EP Impurity H Catalogue B458338 CAS 96946-44-0 M.W 1243.48 M.F C65H82N2O18S2 Specifications FAQs Synonyms: (1R,1'R,2S,2'R)-2,2'-((pentane-1,5-diylbis(oxy))bis(3-oxopropane-3,1-diyl))bis(1-(3,4-dimethoxybenzyl)-6,7-dimethoxy-2-methyl-1,2,3,4-tetrahydroisoquinolin-2-ium) benzenesulfonate