Cisatracurium Besylate EP Impurity D Catalogue B458334 CAS 1075726-88-3 M.W 601.71 M.F C31H39NO9S Specifications FAQs Synonyms: (1R,2R)-1-(3,4-dimethoxybenzyl)-6,7-dimethoxy-2-(3-methoxy-3-oxopropyl)-2-methyl-1,2,3,4-tetrahydroisoquinolin-2-ium benzenesulfonate