(3S,5S)-5-[(2S)-2-cyanopyrrolidine-1-carbonyl]-N-ethyl-N-methylpyrrolidine-3-carboxamide
(3S,5S)-5-[(2S)-2-cyanopyrrolidine-1-carbonyl]-N-ethyl-N-methyl-pyrrolidine-3-carboxamide
(3S,5S)-5-[[(2S)-2-cyano-1-pyrrolidinyl]-oxomethyl]-N-ethyl-N-methyl-3-pyrrolidinecarboxamide
(3S,5S)-5-[(2S)-2-cyanopyrrolidin-1-yl]carbonyl-N-ethyl-N-methyl-pyrrolidine-3-carboxamide