(S)-4,5-dihydroxypentane-2,3-dione => (2R,4S)-2-methyl-2,4-dihydroxydihydrofuran-3-one
(s)-4,5-dihydroxypentane-2,3-dione => (2r,4s)-2-methyl-2,4-dihydroxydihydrofuran-3-one
(S)-4,5-dihydroxypentane-2,3-dione => (2R,4S)-2-methyl-2,4-dihydroxydihydrofuran-3-one
(s)-4,5-dihydroxypentane-2,3-dione => (2r,4s)-2-methyl-2,4-dihydroxydihydrofuran-3-one