The invention relates to therapeutic uses of a dihydrospiro-[cycloalkyl]-pyrimidone derivative represented by formula (I) or a salt thereof: wherein X, Y, R1, R2, R3, m, n, p and q are as described herein. Specifically, the invention relates to a medicament comprising the said derivative or a salt thereof as an active ingredient which is used for preventive and/or therapeutic treatment of a neurodegenerative disease caused by abnormal activity of GSK3.beta., such as Alzheimer disease.

 
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> SUBSTITUTED 8'-PYRI(MI)DINYL-DIHYDROSPIRO-[CYCLOALKYLAMINE]-PYRIMIDO[1,2-a]PYRIMIDIN-- 6-ONE DERIVATIVES

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