| Label | Id | |
|---|---|---|
| (2S)-2-ammonio-4,4-dicarboxybutanoate | http://purl.obolibrary.org/obo/CHEBI_61936 | |
| (3S)-3-aminopropane-1,1,3-tricarboxylic acid zwitterion | http://purl.obolibrary.org/obo/CHEBI_61936 | |
| gamma-carboxy-L-glutamic acid zwitterion | http://purl.obolibrary.org/obo/CHEBI_61936 |
