Pyridazinone derivative and application thereof

The invention belongs to the field of medicines, and particularly relates to a pyridazinone derivative and application thereof, a compound of the pyridazinone derivative and pharmaceutically acceptable salt, solvates of the pyridazinone derivative, including hydrates, polycrystals, prodrugs, co-crystals, tautomers and stereoisomers, and more particularly, the compound can be used as an anti-influenza medicine with a CEN inhibition effect. 本发明属于药物领域，具体涉及一种哒嗪酮衍生物及其用途，其化合物及其药学上可接受的盐、溶剂化物包括水合物、多晶体、前药、共晶体、互变异构物、立体异构体，更具体地说，本发明所述的化合物可以作为具有CEN抑制作用的抗流感药物。