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Rivastigmine derivatives (44-53), tacrine-piperazine hybrid (136), coumarin-benzofuran derivative (169), coumarin-benzylpiperidine hybrid (181) and phenylcinnamide derivative (220) found to be exerting cholinesterase inhibition with IC50 below the range of 1 nM. Whereas, flavone (258) has displayed anticholesterol esterase potential below 1 nM. Benzil like derivative, (273) has also been designed and reported to possess remarkable inhibitory potential (IC50 < 1 nM) against carboxylesterase. These representative results place them in forefront as potential future drug candidates to further develop potent and specific esterase inhibitors.
Singh et al. (Mon,) studied this question.