Chemical Name: (3S)-1-[2-(2,3-Dihydro-5-benzofuranyl)ethyl]-a,a-diphenyl-3-pyrrolidine acetonitrile; (S)-2-(1-(2-(2,3-Dihydrobenzofuran-5-yl)ethyl)pyrrolidin-3-yl)-2,2-diphenylacetonitrile; (S)-Darifenacin 2,2-Desdiphenylacetamide 2,2-Diphenylacetonitrile