N-Benzyl-N'-{[[1-(2-benzylcarbamoyl-2-hydroxy-1-methyl-ethylcarbamoyl)-3-methyl-butyl]-(3-methyl-butyl)-carbamoyl]-methyl}-succinamide

3-{2-[(2-Acetylamino-acetyl)-(3-methyl-butyl)-amino]-3-phenyl-propionylamino}-N-benzyl-2-hydroxy-butyramide

N-Benzyl-N'-({benzyl-[1-(2-benzylcarbamoyl-2-hydroxy-1-methyl-ethylcarbamoyl)-2-phenyl-ethyl]-carbamoyl}-methyl)-succinamide

N-Benzyl-N'-{[[1-(2-benzylcarbamoyl-2-hydroxy-1-methyl-ethylcarbamoyl)-2-phenyl-ethyl]-(3-methyl-butyl)-carbamoyl]-methyl}-succinamide

Formic acid 1-benzylcarbamoyl-2-isocyano-propyl ester