preferred_name: (R)-demethyl-4-deoxygadusol => (S)-demethyl-4-deoxygadusol
preferred_name_lc: (r)-demethyl-4-deoxygadusol => (s)-demethyl-4-deoxygadusol
label: (R)-demethyl-4-deoxygadusol => (S)-demethyl-4-deoxygadusol
label_lc: (r)-demethyl-4-deoxygadusol => (s)-demethyl-4-deoxygadusol