The extract (20 mg) was dissolved in methanol (10 mL) and filtered through a 0.45 μm membrane filter prior to injecting (20 μL) into a Phenomenex C18 column (250 × 4.6 mm, 5 μm; Phenomenex, Cheshire, UK) and monitored at 254 nm, 270 nm, and 320 nm.
The extract (20 mg) was dissolved in methanol (10 mL) and filtered through a 0.45 μm membrane filter prior to injecting (20 μL) into a Phenomenex C18 column (250 × 4.6 mm, 5 μm; Phenomenex, Cheshire, UK) and monitored at 254 nm, 270 nm, and 320 nm.