Partial Hydrolysis of 2 and 3. Each aqueous solution (1 mL) of 2 and 3 (each 1 mg) was heated in a boiling water bath for 1 h. The reaction mixtures of 2 and 3 showed peaks identical with those of pedunculagin (18) and 4,6-(S)-HHDP- D-glucose (26), respectively, on reversed-phase HPLC (solvent B).
Cocciferin D3