108 g of the methanol dry extract was dissolved in 2 l
hot water. The water solution was filtered (residue 1:
2.68 g) and partitioned with diethyl ether, ethyl acetate
and n-butanol (6 · 150 ml). Organic layers of each of
the three solvents were dried with sodium sulphate
anhydrous (Merck p.a.), filtered and evaporated under
vacuum to dryness to give 1.02 g ether fraction, 1.39 g
ethyl acetate fraction, 9.65 g butanol fraction and 71.0
g of the remaining water fraction. The insoluble white
part of the aqueous methanolic extract after partition
between the above three solvents was carefully collected,
filtered, air-dried, weighed (residue 2: 0.53 g) and kept in
the fridge (0 C) together with the other extracts, under
nitrogen atmosphere, until use.