| abstract |
A type of fused heteroaryl derivative, a process for its preparation and its use in medicine are provided. Specifically, a fused heteroaryl derivative represented by the formula (I), a process for producing the same, a pharmaceutical composition containing the same, and the use thereof as a therapeutic agent, particularly as a TLR7 agonist, are provided, Each substituent of the formula is the same as defined in the specification. |