| abstract |
The invention relates to an immunomodulator, a preparation method thereof and application of the immunomodulator as a PD-1/PD-L1 inhibitor. Specifically, the invention discloses a compound of formula (I) or a pharmaceutically acceptable salt, a stereoisomer, a solvate or a prodrug thereof, and a preparation method and application thereof, wherein the definition of each group in the formula is shown in the specification and the claims. |