| 摘要 |
The present invention relates to preventives or remedies for Alzheimer's disease, or to amyloid protein fibril-formation inhibitors, which include as an active ingredient a compound of general formula (I) below or a pharmacologically permitted salt thereof; and also to nitrogen-containing heteroaryl derivatives having specific substituents, or pharmacologically permitted salts thereof, which are valuable as preventives or remedies for Alzheimer's disease, or as amyloid protein fibril-formation inhibitors: <CHEM> (where, R<1> and R<2> are H or alkyl; Z<1> and Z<2> are H, alkyl, alkoxy, haloalkyl or halogeno; Z<3> is alkoxy, SH, alkylthio, NH2, mono- or di-alkylamino, OH or halogeno; Z<4> and Z<5> are H or halogeno; and A is 4,6-pyrimidine-1,3-diyl, 1,3,5-triazine-2,6-diyl, etc).
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