eluted with hexane-acetone (17:1) and afforded compound 2 (9 mg). Fraction 10 was purified by Si gel column chromatog- raphy eluted with hexane-acetone (13:1) and yielded com- pound 3 (10 mg). Fraction 12 was purified by Si gel column chromatography eluted with hexane-acetone (8:1) and af- forded compound 4 (8 mg).