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Abstract
In the current investigation, the chemical composition of the essential oils (EOs) from the stem and leaves of Acridocarpus orientalis A. Juss. were evaluated by gas chromatography (GC) and gas-chromatography-mass spectrometry (GC-MS). The main volatile constituents identified in the essential oil of stem were rich in methyl 8-pimaren-18-oate (43.8 %), octacosane (5.8 %), heptacosane (4.6 %) and hexacosane (4.1 %), methyl dehydroabietate (3.9 %) and methyl pimar-8(14)-en-18-oate (3.6 %), while tetracosane (16.6 %), heptacosane (16.4 %), docosane (13.9 %), hentriacontane (13.5 %), heneicosane (10.9 %) and α-pinene (7.7 %) were abundant in the EO of leaves. Both essential oils, screened against urease, α-glucosidase and carbonic anhydrase II (CA-II) enzyme inhibitory activities, were found active against CA-II and inactive against urease and α-glucosidase enzymes. The leaves of AO were found more active only against CA-II enzyme having IC50 values of 45.6 ± 1.0 μg/mL than stem (156.3 ± 1.5 μg/mL). The results determined that the EO of leaves could be a promising target for anti-cancer treatment. This is the first report, up to the best of the author’s knowledge, on the chemical composition and CA-II activity of this essential oil.