Fraction F2 (703.5 mg) was chromatographed on silica CC repeatedly with n-hexane–EtOAc (8:2) and purified by recrystallization from n-hexane to afford 3 (235.8 mg).
Fractions F10 (664 mg), F14 (949 mg), and F15 (579 mg)
were treated in a similar way to obtain a mixture of 4 and 5
(47.4 mg), 2 (4.1 mg), and 7 (269 mg), respectively