preferred_name: (S)-muconolactone <=> (4,5-dihydro-5-oxofuran-2-yl)-acetate
preferred_name_lc: (s)-muconolactone <=> (4,5-dihydro-5-oxofuran-2-yl)-acetate
label: (S)-muconolactone <=> (4,5-dihydro-5-oxofuran-2-yl)-acetate
label_lc: (s)-muconolactone <=> (4,5-dihydro-5-oxofuran-2-yl)-acetate