PYRAZOLOPYRIMIDINONE COMPOUND AND DERIVATIVE AS WELL AS PREPARATION METHOD THEREFOR AND APPLICATION THEREOF

摘要

Provided are a pyrazolopyrimidinone compound and a derivative (a compound represented by formula I) as well as a preparation method therefor and an application thereof. The compound is the compound represented by formula I or a pharmaceutically acceptable salt, a hydrate or a solvate of the compound represented by formula I. In the compound represented by formula I, R1, R2, R3 and R4 are as defined in the specification.