Index PDB ID Protein Name Organism UniProt ID Ligand Name Canonical SMILES HET Code 1 4WEF Hemagglutinin-neuraminidase Human respirovirus 3 Q6WJ03 2,3-difluoro-N-acetylneuramic acid CC(=O)N[C@H]1[C@H](O)[C@@H](F)[C@@](F)(O[C@H]1[C@H](O)[C@@H](O)CO)C(O)=O FSI