The molecule is a 4-oxo monocarboxylic acid anion that is the conjugate base of [(R)-2,2,3-trimethyl-2-oxocyclopent-3-enyl]acetic acid, arising from deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of a [(R)-2,2,3-trimethyl-5-oxocyclopent-3-en-1-yl]acetic acid.
2-[(1R)-2,2,3-trimethyl-5-oxocyclopent-3-en-1-yl]acetate