(2S,3S,4R,5R,6R)-6-(3-(7-carbamoyl-5-((R)-2-((2-(2- (2,2,2-trifuoroethoxy)phenoxy)ethyl)amino)propyl)indolin-1-yl)propoxy)-3,4,5-trihydroxy tetrahydro-2H-pyran-2-carboxylic acid-D4,"Labeled glucuronide of Silodosin, intended for use as an internal standard for the quantification of Silodosin by GC- or LC-mass spectrometry.",Silodosin Stable Isotopes