to give seven fractions (A–G). Fraction A (2.5 g) was purified by a Sephadex LH-20 column (150 g) with 80% CH2Cl2–MeOH (1.5 L) to afford compound 3 (25.5 mg). Fraction B (1.5 g) was purified by radial chromatography (chromatotron) with 80% hexane–EtOAc
(200 mL) to obtain compound 1 (15.5 mg). Compound 4 (7.8 mg) was
obtained from fraction D (1.1 g) by chromatotron with 80% hexane–
EtOAc (200 mL). Fraction F (1.2 g) was also applied to a Sephadex LH-
20 column (150 g) using 80% CH2Cl2–MeOH (2 L) to provide compound
5 (6.5 mg). Finally, fraction G (1.1 g) was subjected to chromatotron
with 80% hexane–EtOAc (200 mL) to yield compound 2 (15.2 mg) and
compound 6 (4.5 mg).