methyl (3S)-3,4-O-isopropylidene-3,4-dihydroxybutanoate
(S)-methyl 2,2-dimethyl-1,3-dioxane-4-carboxylate
methyl (3S)-3-hydroxy-4-{[(4-methylphenyl)sulfonyl]oxy}butanoate
[(S)-2-(4-Methoxy-phenyl)-[1,3]dioxolan-4-yl]-acetic acid methyl ester
(3S)-hydroxy-γ-butyrolactone