N-Butyl-3-(4-thiocarbamoyl-phenyl)-2-{2-[2-(toluene-4-sulfonylamino)-acetylamino]-acetylamino}-propionamide

N-{[2-Oxo-2-pyrrolidin-1-yl-1-(4-thiocarbamoyl-benzyl)-ethylcarbamoyl]-methyl}-2-(toluene-4-sulfonylamino)-acetamide

N-{[2-Oxo-2-piperidin-1-yl-1-(4-thiocarbamoyl-benzyl)-ethylcarbamoyl]-methyl}-2-(toluene-4-sulfonylamino)-acetamide

N-{[2-Morpholin-4-yl-2-oxo-1-(4-thiocarbamoyl-benzyl)-ethylcarbamoyl]-methyl}-2-(toluene-4-sulfonylamino)-acetamide

N-{[1-(4-Carbamimidoyl-benzyl)-2-oxo-2-pyrrolidin-1-yl-ethylcarbamoyl]-methyl}-2-(toluene-4-sulfonylamino)-acetamide; hydriodide