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

2-[((S)-2-Acetylamino-3-phenyl-propionyl)-(3-methyl-butyl)-amino]-4-methyl-pentanoic acid (2-cyclohexylcarbamoyl-2-hydroxy-1-methyl-ethyl)-amide

2-[((S)-2-Acetylamino-3-phenyl-propionyl)-benzyl-amino]-4-methyl-pentanoic acid (2-cyclohexylcarbamoyl-2-hydroxy-1-methyl-ethyl)-amide

3-{2-[((S)-2-Acetylamino-3-phenyl-propionyl)-benzyl-amino]-3-phenyl-propionylamino}-N-cyclohexyl-2-hydroxy-butyramide

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