| Synonyms: | Vildagliptin Related Compound H;vildagliptin Impurity H;2-Pyrrolidinecarbonitrile, 1,1'-(1-oxo-1,2-ethanediyl)bis-, (2S,2'S)-;(2S,2'S)-1,1'-(1-Oxo-1,2-ethanediyl)bis-2-pyrrolidinecarbonitrile;Vildagliptin Impurity 64;(2S,2'S)-1,1'-(1-Oxoethane-1,2-diyl)bis(pyrrolidine-2-carbonitrile);(2S,2'S)-1,1'-(1-Oxoethane-1,2-diyl)bis(pyrrolidine-2-carbonitrile) (Vildagliptin Impurity）;(2S,2'S)-1,1'-(1-Oxoethane-1,2-diyl)bis(pyrrolidine-2-carbonitrile) (Vildagliptin Impurity） |