(2R)-2-[(2S,3R,4S)-3,4-dihydroxy-5-oxooxolan-2-yl]-2-hydroxyacetic acid;(2R)-2-[(2S,3R,4S)-3,4-dihydroxy-5-oxo-tetrahydrofuran-2-yl]-2-hydroxy-acetic acid;(2R)-2-[(2S,3R,4S)-3,4-dihydroxy-5-oxo-2-tetrahydrofuranyl]-2-hydroxyacetic acid;(2R)-2-[(2S,3R,4S)-3,4-dihydroxy-5-keto-tetrahydrofuran-2-yl]-2-hydroxy-acetic acid;(2R)-2-[(2S,3R,4S)-3,4-dihydroxy-5-oxo-oxolan-2-yl]-2-hydroxy-ethanoic acid
(2R)-2-[(2S,3R,4S)-3,4-dihydroxy-5-oxooxolan-2-yl]-2-hydroxyacetic acid