The root fragments of Z. nummularia were shade-dried at room temperature followed by coarse grinding. The powdered material (300 g) was exhaustively extracted with 99 % methanol for 7 days. The extract was concentrated and dried in a rotary evaporator and which yielded 38 g of brownish mass. The solid mass was suspended in water and successively fractionated with various solvents of increasing polarity, and the corresponding fractions of n-hexane, chloroform, ethyl acetate, and ethanol were obtained.