Atracurium Impurity 26 Besylate

(1R,2S)-1-[(3,4-Dimethoxyphenyl)methyl]-2-[3-(1,1-dimethylethoxy)-3-oxopropyl]-1,2,3,4-tetrahydro-6,7-dimethoxy-2-methyl-isoquinolinium Benzenesulfonate is an intermediate in the synthesis of (R)-trans-Atracurium Besylate (A794495). (R)-trans-Atracurium Besylate has neuromuscular blocking effects and does not produce cardiovascular effects or increase plasma histamine concentrations.