Atropine for comparison Like other anticholinergics,<unk>  is an ester of a carboxylic acid containing (at least) an aromatic ring with an alcohol containing a nitrogen atom. While in the prototype anticholinergic atropine the bicyclic ring is tropane,<unk>  replaces it with quinuclidine. The free base is a yellow oil, while the salt<unk>  succinate forms yellowish crystals.
Solifenacin
Zoliflodacin
Proglumetacin
Revefenacin
Darifenacin
Tofenacin
Arbekacin
Sakacin