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