(S)-2-(1-(2-(2,3-dihydrobenzofuran-5-yl)ethyl-1,1,2,2-d4)pyrrolidin-3-yl)-2,2-diphenylacetamide hydrobromide,(S)-2-(1-(2-(2,3-dihydrobenzofuran-5-yl)ethyl-1,1,2,2-d4)pyrrolidin-3-yl)-2,2-diphenylacetamide hydrobromide,"Used as a medication to treat urinary incontinence. It works by blocking the M3 muscarinic acetylcholine receptor.;Labeled Darifenacin, intended for use as an internal standard for the quantification of Darifenacin by GC- or LC-mass spectrometry.",Darifenacin Stable Isotopes