Extracts of dried and pulverized plant material
(roots, stems, and leaves) were prepared by two methods (maceration and successive Soxhlet extraction). Maceration: pulverized plant materials (0.5 kg) were subjected to maceration with methanol for 24
× 3 h, the extract solutions were filtered and dried under vacuum. Successive Soxhlet extraction: pulverized plant materials (0.8 kg) were subjected to successive extraction for 24 h, with increasing polarity solvents (Pet. ether, chloroform, methanol, and water), the extract solutions were filtered and dried under vacuum and for each extract the extractive value was calculated.