(1S,3S,5S)-2-[(2S)-2-amino-2-(3-hydroxy-1-adamantyl)acetyl]-6,6-dideuterio-2-azabicyclo[3.1.0]hexane-3-(15N)carbonitrile;hydrochloride,Labeled Saxagliptin. Intended for use as an internal standard for the quantification of Saxagliptin by GC- or LC-mass spectrometry.,Saxagliptin Therapeutic