Acetic acid 4-benzenesulfinyl-2,4-dimethyl-5-oxo-tetrahydro-furan-3-yl ester

Acetic acid 3-methyl-2-oxo-1-oxa-spiro[4.5]dec-3-en-4-yl ester

(S)-α-(phenylthio)propanoic acid

3-Benzenesulfinyl-5-(2-methoxy-ethoxymethoxymethyl)-3-methyl-dihydro-furan-2-one