Darifenacin Impurity A

'-diphenyl-3-pyrrolidineacetic Acid;|(S)-2-(1-(2-(2,3-Dihydrobenzofuran-5-yl)ethyl)pyrrolidin-3-yl)-2,2-diphenylacetic acid|(S)-2-(1-(2-(2,3-Dihydrobenzofuran-5-yl)ethyl)pyrrolidin-3-yl)-2,2-diphenylacetic Acid;|1-[2-(2,3-Dihydro-5-benzofuranyl)ethyl]-α,α|1-[2-(2,3-Dihydro-5-benzofuranyl)ethyl]-α,α-diphenyl-3-pyrrolidineacetic Acid;|2-((R)-1-(2-(2,3-dihydrobenzofuran-5-yl)ethyl)pyrrolidin-3-yl)-2,2-diphenylacetic acid|CS-O-14950 ;|Darifenacin Impurity A|Darifenacin Impurity;|Rac Darifenacin acid ;