Filtration and subsequent evaporation of the
combined MeOH extracts to dryness in vacuo afforded a
dark brown gum (102.5 g), which was subjected to silica
gel CC with a gradient of CHCl3–hexane followed by a gradient
of CHCl3–MeOH to give 11 fractions (A–K)
filtrates were concentrated and dried in vacuo to give a dark brown
residue (190 g).