(2S)-N-[(2S)-1-[(2S)-2-carbamoylpyrrolidin-1-yl]-3-(1-methylimidazol-4-yl)-1-oxopropan-2-yl]-6-oxopiperidine-2-carboxamide
(2S)-N-[(1S)-2-[(2S)-2-carbamoylpyrrolidin-1-yl]-1-[(1-methylimidazol-4-yl)methyl]-2-oxo-ethyl]-6-oxo-piperidine-2-carboxamide
(2S)-N-[(1S)-2-[(2S)-2-carbamoyl-1-pyrrolidinyl]-1-[(1-methyl-4-imidazolyl)methyl]-2-oxoethyl]-6-oxo-2-piperidinecarboxamide
(2S)-N-[(1S)-2-[(2S)-2-carbamoylpyrrolidin-1-yl]-2-keto-1-[(1-methylimidazol-4-yl)methyl]ethyl]-6-keto-pipecolinamide
(2S)-N-[(2S)-1-[(2S)-2-aminocarbonylpyrrolidin-1-yl]-3-(1-methylimidazol-4-yl)-1-oxo-propan-2-yl]-6-oxo-piperidine-2-carboxamide