– PD-1-IN-17 has CAS#CAS:1673560-66-1, which is a programmed cell death-1 (PD-1) inhibitor. PD-1-IN-17 was first reported in patent WO2015033301A1, (Compound 4), inhibits 92% splenocyte proliferation at 100 nM. PD-1-IN-17 may be related to CA-170 (AUPM170), which is a potent PD-1 inhibitor and curreently under clinical trials.