SMILES: C1C=C(N2[C@H]1CC2=O)C(=O)[O-]
Description: The molecule is a monocarboxylic acid anion that is the conjugate base of (5R)-carbapenem-3-carboxylic acid, obtained by deprotonation of the carboxy group. It is a conjugate base of a 1-carbapenem-3-carboxylic acid.