| Label | Id | |
|---|---|---|
| 1-azacyclopentan-2-one | http://purl.obolibrary.org/obo/CHEBI_36592 | |
| 2-ketopyrrolidine | http://purl.obolibrary.org/obo/CHEBI_36592 | |
| 2-oxopyrrolidine | http://purl.obolibrary.org/obo/CHEBI_36592 | |
| 2-pyrrolidinone | http://purl.obolibrary.org/obo/CHEBI_36592 | |
| 2-pyrrolidone | http://purl.obolibrary.org/obo/CHEBI_36592 | |
| Butyrolactam | http://purl.obolibrary.org/obo/CHEBI_36592 | |
| Pyrrolidinone | http://purl.obolibrary.org/obo/CHEBI_36592 | |
| Pyrrolidone | http://purl.obolibrary.org/obo/CHEBI_36592 | |
| alpha-pyrrolidinone | http://purl.obolibrary.org/obo/CHEBI_36592 | |
| alpha-pyrrolidone | http://purl.obolibrary.org/obo/CHEBI_36592 | |
| gamma-butyrolactam | http://purl.obolibrary.org/obo/CHEBI_36592 | |
| pyrrolidin-2-one | http://purl.obolibrary.org/obo/CHEBI_36592 | |
| gamma-aminobutyric lactam | http://purl.obolibrary.org/obo/CHEBI_36592 | |
| 4-aminobutyric acid lactam | http://purl.obolibrary.org/obo/CHEBI_36592 | |
| gamma-aminobutyric acid lactam | http://purl.obolibrary.org/obo/CHEBI_36592 |
