1 5F2 Ethyl (2z,4s)-4-[(N-acetyl-L-phenylalanyl)amino]-5-[(3s)-2-oxopyrrolidin-3-yl]pent-2-enoate 1.000 2 5EC Ethyl (2z,4s)-4-{[N-(3-methylbutanoyl)-L-phenylalanyl]amino}-5-[(3s)-2-oxopyrrolidin-3-yl]pent-2-enoate 0.909 3 5EB Ethyl (2z,4s)-4-{[N-(3-cyclopropylpropanoyl)-L-phenylalanyl]amino}-5-[(3s)-2-oxopyrrolidin-3-yl]pent-2-enoate 0.882 4 5GH Ethyl (4s)-5-[(3s)-2-oxopyrrolidin-3-yl]-4-[(3-phenylpropanoyl)amino]pent-2-enoate 0.867 5 5E8 Ethyl (2z,4s)-4-{[(2s)-2-methyl-3-phenylpropanoyl]amino}-5-[(3s)-2-oxopyrrolidin-3-yl]pent-2-enoate 0.839 6 G81 Ethyl (4r)-4-{[N-(tert-butoxycarbonyl)-L-phenylalanyl]amino}-5-[(3s)-2-oxopyrrolidin-3-yl]pentanoate 0.829 7 5ED Ethyl (2z,4s)-4-[(N-{[(2-cyclopropylethyl)amino](oxo)acetyl}-L-phenylalanyl)amino]-5-[(3s)-2-oxopyrrolidin-3-yl]pent-2-enoate 0.811 8 5EX Ethyl (2z,4s)-4-[(N-{[(cyclobutylmethyl)amino](oxo)acetyl}-L-phenylalanyl)amino]-5-[(3s)-2-oxopyrrolidin-3-yl]pent-2-enoate 0.811 9 YVG D-phenylalanyl-N-{(2r)-5-ethoxy-5-oxo-1-[(3s)-2-oxopyrrolidin-3-yl]pentan-2-yl}-L-phenylalaninamide 0.789 10 YV7 D-phenylalanyl-N-{(2r)-5-ethoxy-5-oxo-1-[(3s)-2-oxopyrrolidin-3-yl]pentan-2-yl}-4-fluoro-L-phenylalaninamide 0.769 11 YVJ 4-fluoro-D-phenylalanyl-N-{(2r)-5-ethoxy-5-oxo-1-[(3s)-2-oxopyrrolidin-3-yl]pentan-2-yl}-L-phenylalaninamide 0.769 12 G75 Ethyl (4r)-4-({N-[(benzyloxy)carbonyl]-L-phenylalanyl}amino)-5-[(3s)-2-oxopyrrolidin-3-yl]pentanoate 0.763 13 YVD 4-fluoro-D-phenylalanyl-N-{(2r)-5-ethoxy-5-oxo-1-[(3s)-2-oxopyrrolidin-3-yl]pentan-2-yl}-4-fluoro-L-phenylalaninamide 0.750