| 摘要 |
The present invention provides an excellent acetylcholinesterase inhibitor. That is, it provides an acetylcholinesterase inhibitor comprising a 1-benzylpyridinium salt represented by the following formula:wherein R<1>, R<2>, R<3 >and R<4 >are the same as or different from each other and each represents a hydrogen atom, a halogen atom, a hydroxyl group, a nitrile group, a C1-6 alkyl group, a C1-6 alkoxy group etc.; R<5 >represents a hydrogen atom, a halogen atom etc.; the partial structure:is a group represented by the formula >C(R<6>)-CH2- (wherein R<6 >is a hydrogen atom or a halogen atom) or >C=CH-; X- represents a halide ion or organic sulfonic acid ion; and m is 0 or an integer from 1 to 5.
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