Atracurium Impurity 4

AtracuriuM IMpurity A1 (trans-Monoquatenary) Atracurium Impurity 34 Iodide Atracurium Impurity 12 Iodide (Mixture of Diastereomers) Atracurium Impurity 24 Atracurium Impurity 32

Atracurium Impurity 10 Iodide (Mixture of Diastereomers) Atracurium Impurity 28 Iodide Atracurium Impurity 33 Iodide R-tetrahydropapaverine HCl AtracuriuM IMpurity A2 (cis-Monoquatenary)

AtracuriuM IMpurity V Atracurium Impurity 11 Iodide (Mixture of Diastereomers) Atracurium Impurity 29 Iodide 6,7-Dimethoxy-2-methyl-1-(3,4,5-trimethoxybenzyl)-1,2,3,4-tetrahydroisoquinoline hydrochloride Atracurium Impurity 9

Atracurium Impurity 36 Iodide (1R,1'R,2S,2'S)-2,2'-[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 Benzenesulfonate Atracurium Impurity 19