Soft anticholinergic esters of the formulas:wherein R1 and R2 are both phenyl or one of R1 and R2 is phenyl and the other is cyclopentyl； R is C1-C8 alkyl, straight or branched chain； and X− is an anion with a single negative charge； 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.
