The molecule is the (S)-enantiomer of 5-oxo-2,5-dihydro-2-furylacetic acid. It is a conjugate acid of a (S)-5-oxo-2,5-dihydro-2-furylacetate. It is an enantiomer of a (R)-5-oxo-2,5-dihydro-2-furylacetic acid.
2-[(2S)-5-oxo-2H-furan-2-yl]acetic acid