| abstract |
The present invention provides a novel tricyclic aromatic heterocyclic compound, and a method for preparing the same, a pharmaceutical composition and application, and specifically, the present invention provides a compound represented by the following formula I, or an optical isomer, hydrate, solvate, Or a pharmaceutically acceptable salt thereof, wherein the definition of each group is as described in the specification. The compound represented by the above formula (I) may be used to treat a disease associated with the PD-1/PD-L1 signaling pathway. I |