The leaves and flowers were dried in the dark and at room temperature
(20 ◦C) for one week; ground to fine powder in amechanic
grinder to 60 mesh size (Sejali and Anuar, 2011) and submitted to
ultrasound-assisted solvent extraction: 1 g of plant material was
extracted with 25mL methanol using a sonicator Bandelin Sonorex
(Germany) at 35 kHz and 200Wfor 60 min at 20 ◦C.