The sixth fraction from Sephadex LH-20 chromatography was fractionated on an ODS column, eluted by a stepwise gradient (0–100% MeOH/H2O) to afford 11 fractions. The third fraction was subjected to HPLC separation (Zorbax Eclipse XDB-C8, 5 μm, 250 × 9.4 mm column, 3.0 mL/min, gradient elution from 10 to 80% MeCN/H2O over 15 min, with isocratic 0.01% TFA modifier) to yield 1–6; the sixth fraction was subjected to HPLC separation (Zorbax SB-C18, 5 μm, 250 × 9.4 mm column, 3.0 mL/min, gradient elution from 30 to 75% MeCN/H2O over 14 min, with isocratic 0.01% TFA modifier) to yield 8a/b and 9a/b; and the seventh fraction was subjected to HPLC separation (Zorbax Eclipse XDB-C8, 5 μm, 250 × 9.4 mm column, 3.0 mL/min, gradient elution from 40 to 55% MeCN/H2O over 20 min, with isocratic 0.01% TFA modifier) to yield 11 and 13.