Three new furoquinoline alkaloids, leptanoines A–C (1–3) along with three known
compounds (4–6) were isolated from the leaves of Evodia lepta. Their structures were
identified by interpretation of their spectroscopic data as well as comparison with those
reported in the literature. In addition, all isolated compounds were evaluated for their
acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) activities. Compound 4
showed the highest inhibitory activity towards BChE with an IC50 value of 47.9 μM. On the
other hand, Compound 5 showed the highest inhibitory activity towards AChE with an IC50
value of 69.1 μM.