| Label | Id | |
|---|---|---|
| 4-Oxoproline | http://purl.obolibrary.org/obo/CHEBI_37011 | |
| 4-oxo-DL-proline | http://purl.obolibrary.org/obo/CHEBI_37011 | |
| 4-oxoproline | http://purl.obolibrary.org/obo/CHEBI_37011 | |
| 4-oxopyrrolidine-2-carboxylic acid | http://purl.obolibrary.org/obo/CHEBI_37011 |
