@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .

<https://bioregistry.io/pdb-ccd:PI> rdfs:seeAlso <http://bio2rdf.org/ccd:PI>,
        <https://identifiers.org/pdb-ccd:PI>,
        <https://n2t.net/pdb-ccd:PI>,
        <https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/PI> .