Fig. 2

HPLC chromatograph of methanol extract of O. compressa. The results revealed the presence of 14 compounds including gallic acid (2.07 µg/mg), stilbene (9.26 µg/mg), flavonoid/anthocyanin (9.15 µg/mg), imidazole (8.55 µg/mg), lignan (7.27 µg/mg), quinazoline (7.15 µg/mg), quinoline (4.49 µg/mg), oxindole (6.06 µg/mg), quinolizidine (5.01 µg/mg), xanthone (4.99 µg/mg), apigenin (4.29 µg/mg), tannins (3.86 µg/mg), artemisinin (2.72 µg/mg) and acridone (2.47 µg/mg).