Index Ligand Name Ligand ID Canonical SMILES #Protein-Ligand Complex(es) 1 (1R,2S)-2-{[N-({[1-(tert-butoxycarbonyl)-4-ethylpiperidin-4-yl]oxy}carbonyl)-L-leucyl]amino}-1-hydroxy-3-[(3S)-2-oxopyrrolidin-3-yl]propane-1-sulfonic acid COVPDB534 CCC1(CCN(CC1)C(=O)OC(C)(C)C)OC(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](C[C@@H]1CCNC1=O)[C@H](O)S(O)(=O)=O 1