preferred_name: (2R,4S)-2-methyltetrahydrofuran-2,3,3,4-tetrol(in) <=> (2R,4S)-2-methyltetrahydrofuran-2,3,3,4-tetrol(out)
preferred_name_lc: (2r,4s)-2-methyltetrahydrofuran-2,3,3,4-tetrol(in) <=> (2r,4s)-2-methyltetrahydrofuran-2,3,3,4-tetrol(out)
label: (2R,4S)-2-methyltetrahydrofuran-2,3,3,4-tetrol(in) <=> (2R,4S)-2-methyltetrahydrofuran-2,3,3,4-tetrol(out)
label_lc: (2r,4s)-2-methyltetrahydrofuran-2,3,3,4-tetrol(in) <=> (2r,4s)-2-methyltetrahydrofuran-2,3,3,4-tetrol(out)