Patent ID: 8664226

Claim:
A 3-heteroarylpyrimidin-4(3H)-one derivative represented by the formula (I) below or salt thereof, or solvate thereof: wherein A is a pyridyl group, a pyrimidinyl group, a pyrazinyl group, a triazinyl group, a thiazolyl group, an isoxazolyl group, a pyrazolyl group, a triazolyl group, a quinolynyl group, an isoquinolynyl group, a benzimidazolyl group, or a benzothiazolyl group, wherein R 1 and R 2 , which may be the same or different from each other, represent a C 1-6 alkyl group, and wherein each of R 3 , R 4 , and R 5 is independently absent or represents a hydrogen atom, a halogen atom, a C 1-6 alkyl group, a halo C 1-6 alkyl group, a C 1-6 alkoxy group which may have a substituent group, a C 3-6 cycloalkyloxy group which may have a substituent group, a 5- to 10- membered heteroaryl group, a hydroxyl group, or a nitro group.