(S)-2-[2-Morpholin-4-yl-2-oxo-1-(4-thiocarbamoyl-benzyl)-ethylcarbamoyl]-pyrrolidine-1-carboxylic acid benzyl ester

(S)-2-[1-(4-Carbamimidoyl-benzyl)-2-oxo-2-pyrrolidin-1-yl-ethylcarbamoyl]-pyrrolidine-1-carboxylic acid benzyl ester; hydriodide

(S)-2-[1-Butylcarbamoyl-2-(4-carbamimidoyl-phenyl)-ethylcarbamoyl]-pyrrolidine-1-carboxylic acid benzyl ester; hydriodide

(S)-2-[1-(4-Carbamimidoyl-benzyl)-2-oxo-2-piperidin-1-yl-ethylcarbamoyl]-pyrrolidine-1-carboxylic acid benzyl ester; hydriodide

(S)-2-[1-(4-Methylsulfanylcarbonimidoyl-benzyl)-2-oxo-2-pyrrolidin-1-yl-ethylcarbamoyl]-pyrrolidine-1-carboxylic acid benzyl ester; hydriodide