| Label | Id | |
|---|---|---|
| purine bases | http://purl.obolibrary.org/obo/CHEBI_26386 | |
| purine nucleobase | http://purl.obolibrary.org/obo/CHEBI_26386 | |
| purine nucleobases | http://purl.obolibrary.org/obo/CHEBI_26386 | |
| a purine nucleobase | http://purl.obolibrary.org/obo/CHEBI_26386 |
