| Label | Id | |
|---|---|---|
| orthoquinone | http://purl.obolibrary.org/obo/CHEBI_25622 | |
| orthoquinones | http://purl.obolibrary.org/obo/CHEBI_25622 | |
| oxide | http://purl.obolibrary.org/obo/CHEBI_25741 | |
| oxides | http://purl.obolibrary.org/obo/CHEBI_25741 | |
| oxidoperoxidonitrate(1-) | http://purl.obolibrary.org/obo/CHEBI_25941 | |
| oxigeno | http://purl.obolibrary.org/obo/CHEBI_25805 | |
| oxime | http://purl.obolibrary.org/obo/CHEBI_25750 | |
| oximes | http://purl.obolibrary.org/obo/CHEBI_25750 | |
| oxopentanoate | http://purl.obolibrary.org/obo/CHEBI_25798 | |
| oxopentanoates | http://purl.obolibrary.org/obo/CHEBI_25798 | |
| oxoproline | http://purl.obolibrary.org/obo/CHEBI_25801 | |
| oxopurine | http://purl.obolibrary.org/obo/CHEBI_25810 | |
| oxopurines | http://purl.obolibrary.org/obo/CHEBI_25810 | |
| oxygen | http://purl.obolibrary.org/obo/CHEBI_25805 | |
| oxygene | http://purl.obolibrary.org/obo/CHEBI_25805 |