(3S)-3-(2-Amino-2-oxo-1,1-diphenylethyl)-1,1-bis[2-(2,3-dihydro-5-benzofuranyl)ethyl]pyrrolidinium Bromide is an impurity of Darifenacin (D193400, HBr); a medication used to treat urinary incontinence. It works by blocking the M3 muscarinic acetylcholine receptor.
