N-{1-[((S)-2-Benzyloxy-5-oxo-tetrahydro-furan-3-ylcarbamoyl)-methyl]-6-butyl-2-oxo-1,2-dihydro-pyridin-3-yl}-3-phenyl-propionamide

N-{6-Benzyl-1-[((S)-2-benzyloxy-5-oxo-tetrahydro-furan-3-ylcarbamoyl)-methyl]-2-oxo-1,2-dihydro-pyridin-3-yl}-3-phenyl-propionamide

N-{1-[((S)-2-Benzyloxy-5-oxo-tetrahydro-furan-3-ylcarbamoyl)-methyl]-6-methyl-2-oxo-1,2-dihydro-pyridin-3-yl}-3-phenyl-propionamide

N-{1-[((S)-2-Benzyloxy-5-oxo-tetrahydro-furan-3-ylcarbamoyl)-methyl]-2-oxo-6-phenyl-1,2-dihydro-pyridin-3-yl}-3-phenyl-propionamide

3(S)-acetylamino-N-{1-[((3S)-2-benzyloxy-5-oxo-tetrahydrofuran-3-ylcarbamoyl)methyl]-2-oxo-5-phenyl-2,3-dihydro-1H-benzo[e][1,4]diazepin-3-yl}succinamic acid benzyl ester