SMILES: C1CC(=O)CC1C(=O)[O-]
Description: The molecule is a 4-oxo monocarboxylic acid anion that is the conjugate base of 3-oxocyclopentanecarboxylic acid, obtained by deprotonation of the carboxy group. It is a conjugate base of a 3-oxocyclopentanecarboxylic acid.