(S)-1-[2-(2-Oxo-azepan-1-yl)-acetyl]-pyrrolidine-2-carboxylic acid ethyl ester

1-[2-(4-Isobutyl-5-oxo-oxazolidin-3-yl)-2-oxo-ethyl]-azepan-2-one

(S)-3-Methyl-2-[2-(2-oxo-azepan-1-yl)-acetylamino]-butyric acid methyl ester

1-[2-((S)-4-Benzyl-5-oxo-oxazolidin-3-yl)-2-oxo-ethyl]-azepan-2-one