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Six aporphine alkaloids (1–6) were isolated from Artabotrys spinosus roots based on bioassay-guided fraction and chromatographic methods. All isolated alkaloids were evaluated for their cholinesterase (ChEs) inhibitory activities, in which compounds 4 and 6 exhibited the highest activity toward butyrylcholinesterase (BChE) and acetylcholinesterase (AChE), respectively. The Lineweaver-Burk plots suggested that 4 and 6 were mixed mode inhibitors toward BChE and AChE enzymes, respectively. In addition, the experimental results were also confirmed by molecular docking analysis. This information can help in designing a new inhibitor in the class of aporphine alkaloids in against Alzheimer's disease.

Bioactive Aporphine Alkaloids from the Roots of Artabotrys spinosus: Cholinesterase Inhibitory Activity and Molecular Docking Studies