Stereoisomers of N-substituted soft anticholinergics and their zwitterionic metabolite based on glycopyrrolate – syntheses and pharmacological evaluations
Soft anticholinergic zwitterions of the formulas:
wherein R
1
and R
2
are both phenyl or one of R
1
and R
2
is phenyl and the other is cyclopentyl; and wherein each asterisk marks a chiral center; said compound having the R, S or RS stereoisomeric configuration at each chiral center unless specified otherwise, or being a mixture thereof.