Fraction IV (130 mg) was further purified by reverse-phase HPLC on a C18 l-Bondapak column (300 7.8 mm, flow rate = 2.0 ml/min) with methanol/water (45:55) for 32 min to yield pure compounds 1–3. Fraction VI (340 mg) was also chromatographed on this C18 l-Bondapak column (300 7.8 mm) with methanol/water (3:7) for 30 min to give pure compounds 4–6. The flow rate was also set as 2.0 ml/min.