N-hexane and ethyl acetate extracts were evaporated in a rotary evaporator (Buchi-water
bath-B-480, Switzerland) below 40 C, while ethanol 80% extracts were freeze-dried (Thermo Electron Corporation- Heto Power Dry LL 300 Freeze Dryer, Czechoslovak). The dried extracts after evaporation of solvents were weighed to determine the yield and stored at 20 C until used.