You could use oxaliplatin (OXA) which not only induces tumor cell apoptosis but can also cause immunogenic death. For more information you may want to refer to the paper I have attached below for your reference.
Article Inhibition of Indoleamine 2, 3-dioxygenase 1 synergizes with...
The investigators employed a xenograft tumor mouse model and confirmed the improved anti-tumor efficacy of OXA against murine colorectal cancer in immune-intact host (BALB/c mice).
The murine colorectal cancer (CRC) model was established with subcutaneous inoculation of CT26 cells. OXA was administered every 3 days for a consecutive four times after xenograft tumor volume reached 50 mm^3, and both tumor growth and overall mouse survival were monitored regularly.
They observed that treatment with OXA significantly delayed xenograft tumor progression in wild-type BALB/c mice in comparison with the vehicle.
Therefore, their data demonstrated that OXA greatly prolonged the overall survival of tumor-bearing wild-type BALB/c mice, and this improved therapeutic efficacy of OXA was dependent on the intact immune system.