(R)-demethyl-4-deoxygadusol => (S)-demethyl-4-deoxygadusol
(r)-demethyl-4-deoxygadusol => (s)-demethyl-4-deoxygadusol
(R)-demethyl-4-deoxygadusol => (S)-demethyl-4-deoxygadusol
(r)-demethyl-4-deoxygadusol => (s)-demethyl-4-deoxygadusol