2(1H)-ISOQUINOLINEPROPANOIC ACID,1-[(3,4-DIMETHOXYPHENYL)METHYL]-3,4-DIHYDRO-6,7-DIMETHOXY-, 1,5-PENTANEDIYL ESTER, (R*,R*)-(-)-, ETHANEDIOATE 2(1H)-Isoquinolinepropanoic acid, 1-[(3,4-dimethoxyphenyl)methyl]-3,4-dihydro-6,7-dimethoxy-, 1,5-pentanediyl ester, (R*,R*)-(-)-,ethanedioate (1:2) Atracurium intermediates 5-[3-[(1R)-1-[(3,4-dimethoxyphenyl)methyl]-6,7-dimethoxy-3,4-dihydro-1H-isoquinolin-2-yl]propanoyloxy]pentyl 3-[(1R)-1-[(3,4-dimethoxyphenyl)methyl]-6,7-dimethoxy-3,4-dihydro-1H-isoquinolin-2-yl]propanoate N,N'-4,10-dioxa-3,11-dioxotridecylene-1,13-diyl-bis-(R)-(-)-tetrahydropapaverine 2(1H)-Isoquinolinepropanoic acid, 1-[(3,4-dimethoxyphenyl)methyl]-3,4-dihydro-6,7-dimethoxy-, 2,2'-(1,5-pentanediyl) ester, (1R,1'R)- (R,R)-N,N'-Didemethyl Atracurium Cisatracurium Besilate Impurity 26