https://w3id.org/framester/conceptnet5/data/en/purine <https://w3id.org/framester/conceptnet5/schema/InstanceOf> <https://w3id.org/framester/conceptnet5/data/en/chemical_compound> <https://w3id.org/framester/conceptnet5/data/en/chemical_substance> <https://w3id.org/framester/conceptnet5/schema/RelatedTo> <https://w3id.org/framester/conceptnet5/data/en/adenine> <https://w3id.org/framester/conceptnet5/data/en/xanthine> <https://w3id.org/framester/conceptnet5/data/en/hypoxanthine> <https://w3id.org/framester/conceptnet5/data/en/uric_acid> <https://w3id.org/framester/conceptnet5/data/en/guanine> risorse dalla linked data cloud