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This study aimed to investigate the chemical compositions of the leaf essential oils of  Magnolia villosa  (Miq.) H. Keng. and  M. maingayi  King. growing in Malaysia. The leaf essential oils were obtained by hydrodistillation and fully characterized by gas chromatography and gas chromatography-mass spectrometry. Analysis of  M. villosa  and  M. maingayi  leaf essential oils resulted in 96.4% and 98.7% of the total essential oil, respectively. The main components of  M. villosa  leaf essential oil were β-caryophyllene (32.8%) and α-humulene (8.8%), while in  M. maingayi  leaf essential oil gave β-elemene (27.4%), β-caryophyllene (16.4%), and ( E )-nerolidol (14.4%). Anticholinesterase inhibitory activity was also evaluated using acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitory assays.  M. villosa  leaf essential oil revealed a moderate inhibitory effect on AChE (percentage inhibition, I%: 62.5%) and BChE (I%: 74.8%) at a concentration of 1,000 μg/mL. In conclusion, the leaf essential oils of  M. villosa and M .  maingayi  were characterized and showed promising anticholinesterase inhibitory activity, suggesting their potential as natural sources of therapeutic agents for managing cholinergic dysfunction-related diseases.

journal of essential oil bearing plants

Chemical Composition and Anticholinesterase Inhibitory Activity of Essential Oils from  Magnolia villosa  (Miq.) H.Keng. and  Magnolia maingayi  King. Leaves