(1R,2R)-1-[(3,4-Dimethoxyphenyl)methyl]-2-[3-(tert-butoxy)-3-oxopropyl]-1,2,3,4-tetrahydro-6,7-dimethoxy-2-methylisoquinolinium benzenesulfonate

CAS 1075727-00-2

(1R,2R)-1-[(3,4-Dimethoxyphenyl)methyl]-2-[3-(tert-butoxy)-3-oxopropyl]-1,2,3,4-tetrahydro-6,7-dimethoxy-2-methylisoquinolinium benzenesulfonate (CAS 1075727-00-2) has a chemical story that connects molecular identity with practical chemistry. CAS 1075727-00-2 is a stereochemically defined quaternary tetrahydroisoquinolinium benzenesulfonate associated with cisatracurium and atracurium process chemistry. Public catalogs describe it as a cisatracurium-related quaternary ammonium salt, tert-butyl ester intermediate, or atracurium-related impurity/reference material rather than an independently administered medicine. Its (1R,2R) stereochemistry, permanent quaternary ammonium center, tert-butyl ester and benzenesulfonate counterion make it useful for understanding how the complex bisbenzylisoquinolinium drug family is assembled and controlled analytically. The clinical role of cisatracurium itself should not be transferred automatically to this exact process-related CAS entry.

The exact CAS identity matters because related salts, stereoisomers, intermediates and finished medicines can play very different roles even when their names look closely related.