(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 => (r)-demethyl-4-deoxygadusol