Oxybutynin

Oxybutynin is a quaternary ammonium compound derived from the tropane alkaloid scaffold, featuring a piperidine ring fused to a tetrahydrofuran moiety, with a butoxy substituent at the 6-position of the tropane nucleus. Its structure incorporates an ester linkage between the hydroxyl group of the butoxy chain and the nitrogen of the piperidine ring, conferring enhanced lipophilicity compared to the parent drug, which lacks this esterification. This compound acts as a direct anticholinergic agent, utilized as an HPLC reference standard for quantification in pharmaceutical formulations.