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A novel series of flavokawain B derivatives, chalcone Mannich bases (4–10) were designed, synthesized, characterized, and evaluated for the inhibition activity against acetylcholinesterase (AChE). Biological results revealed that four compounds displayed potent activities against AChE with IC50 values below 20μM. Moreover, the most promising compound 8 was 2-fold more active than rivastigmine, a well-known...
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