saxagliptin
3-cyano-(αS)-α-(3-hydroxytricyclo[3.3.1.13,7]dec-1-yl)-β-oxo-(1S,3S,5S)-2-azabicyclo[3.1.0]hexane-2-ethanecarbamic acid 1,1-dimethylethyl ester
(1S,3S,5S)-2-azabicyclo[3.1.0]hexane-3-carbonitrile
(1S,3S,5S)-2-azabicyclo[3.1.0]hexane-3-carbonitrile 4-methylbenzenesulfonate