After the reaction mixture was allowed to stir at room temperature for 5 hours, water (5 mL) was added and the layers were separated. The aqueous layer was extracted with EtOAc (3 x 5 mL). The combined organic extracts were washed with brine (5 mL), dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure by rotary evaporation to give a yellow foam. Purification by preparatory thin layer chromatography (10% Et2O/CH2Cl2) afforded 9-8 (6.2 mg, 31%) as a colorless foam, and xylogranatopyridine B (3.4 mg, 17%) as a colorless foam.