preferred_name: D-galactaro-1,5-lactone <=> D-galactaro-1,4-lactone
preferred_name_lc: d-galactaro-1,5-lactone <=> d-galactaro-1,4-lactone
label: D-galactaro-1,5-lactone <=> D-galactaro-1,4-lactone
label_lc: d-galactaro-1,5-lactone <=> d-galactaro-1,4-lactone