1 G81 Ethyl (4r)-4-{[N-(tert-butoxycarbonyl)-L-phenylalanyl]amino}-5-[(3s)-2-oxopyrrolidin-3-yl]pentanoate 1.000 2 5F2 Ethyl (2z,4s)-4-[(N-acetyl-L-phenylalanyl)amino]-5-[(3s)-2-oxopyrrolidin-3-yl]pent-2-enoate 0.829 3 G75 Ethyl (4r)-4-({N-[(benzyloxy)carbonyl]-L-phenylalanyl}amino)-5-[(3s)-2-oxopyrrolidin-3-yl]pentanoate 0.775 4 GHY Propan-2-yl N-[(2s)-1-oxidanylidene-1-[[(2s)-1-oxidanyl-3-[(3s)-2-oxidanylidenepyrrolidin-3-yl]propan-2-yl]amino]-3-phenyl-propan-2-yl]carbamate 0.771 5 5GH Ethyl (4s)-5-[(3s)-2-oxopyrrolidin-3-yl]-4-[(3-phenylpropanoyl)amino]pent-2-enoate 0.765 6 5EC Ethyl (2z,4s)-4-{[N-(3-methylbutanoyl)-L-phenylalanyl]amino}-5-[(3s)-2-oxopyrrolidin-3-yl]pent-2-enoate 0.763 7 5EB Ethyl (2z,4s)-4-{[N-(3-cyclopropylpropanoyl)-L-phenylalanyl]amino}-5-[(3s)-2-oxopyrrolidin-3-yl]pent-2-enoate 0.744 8 5E8 Ethyl (2z,4s)-4-{[(2s)-2-methyl-3-phenylpropanoyl]amino}-5-[(3s)-2-oxopyrrolidin-3-yl]pent-2-enoate 0.743 9 GHZ 2-methylpropyl N-[(2s)-1-oxidanylidene-1-[[(2s)-1-oxidanyl-3-[(3s)-2-oxidanylidenepyrrolidin-3-yl]propan-2-yl]amino]-3-phenyl-propan-2-yl]carbamate 0.703