Vildagliptin Carboxylic Acid 2-Pyrrolidinecarboxamide,1-(hydroxyacetyl)-,(S)-(9CI) (2S)-1-(Chloroacetyl)-2-pyrrolidinecarbonitrile 1,3,5,7-tetrahydroxyadamantane Amantadine Methyl L-prolinate hydrochloride Vildagliptin Impurity 19 N-acetic acid-1-aMino-3-adaMantanol (R)-1-(2-chloroacetyl)pyrrolidine-2-carboxaMide Vildagliptin IMpurity 2 (Mixture of DiastereoMers) Vildagliptin Impurity 69 vildagliptin Impurity Q Vildagliptin Related Compound F Vildagliptin Impurity 25 (5aR,10aR)-1,2,3,5a,6,7,8,10a-octahydrodipyrrolo[1,2-c:1',2'-f]pyrazine-5,10-dione Dichloroacetyl chloride (5aS)-2,3,5aβ,6,7,8-Hexahydro-1H,5H-dipyrrolo[1,2-a:1',2'-d]pyrazine-5,10(10aβH)-dione Vildagliptin Related Compound G