Not Less Than - 95%
(2S)-1-(Chloroacetyl)-2-pyrrolidinecarbonitrile; (2S)-1-Chloroacetylpyrrolidine-2-carbonitrile; (S)-1-(2-Chloroacetyl)pyrrolidine-2-carbonitrile;1-Chloroacetyl-2-(S)-cyanopyrrolidine; Vildagliptin Cyno Impurity