Index Ligand Name Ligand ID Canonical SMILES #Protein-Ligand Complex(es) 1 [[(2R)-2-[(4-ethyl-2,3-dioxo-piperazin-1-yl)carbonylamino]-4-(4-hydroxyphenyl)butanoyl]amino]methylboronic acid COVPDB668 Oc1ccc(cc1)CC[C@H](C(=O)NCB(O)O)NC(=O)N2CCN(C(=O)C2=O)CC 1