SMILES: C1CC(=NC1)C(=O)O
Description: The molecule is the product resulting from formal oxidation of DL-proline by loss of hydrogen from the nitrogen and from the carbon alpha to the carboxylic acid, with the formation of a C=N bond. It is a conjugate acid of a 1-pyrroline-2-carboxylate. It is a tautomer of a 1-pyrroline-2-carboxylic acid zwitterion.