PD-L1-IN-3 (Compound 4a) functions as an inhibitor of the PD-1/PD-L1 axis, with an IC50 value of 4.97 nM for PD-L1 inhibition and an EC50 value of 2.70 μM for Jurkat T cell modulation. It antagonizes the PD-1/PD-L1 interaction by binding to the PD-L1 dimer, obstructing PD-1 signaling. This compound is utilized in research pertaining to lung cancer and melanoma [1].

PD-1/PD-L1-IN-9, with an IC50 of 3.8 nM, is a potent and orally active inhibitor of the PD-1/PD-L1 interaction. It enhances the immune cells' ability to kill tumor cells and demonstrates significant antitumor activity in vivo in a CT26 mouse model.

IMMH 010 maleate (YPD-30 maleate) is an orally available programmed cell death ligand 1 inhibitor with potential antitumor activity for the study of neurological disorders and advanced malignant solid tumors.

LSD1-IN-27 is a potent LSD1 inhibitor with an IC50 value of 13 nM.LSD1-IN-27 inhibited the stemness and migration of gastric cancer cells.LSD1-IN-27 inhibited the expression of PD-L1 in BGC-823 and MFC cells.LSD1-IN-27 potentiated the T-cell immune response against gastric cancer.

PD-1/PD-L1-IN-10 is an orally available PD-1/PD-L1 inhibitor (IC50 value of 2.7 nM) that shows anti-tumor activity.

PD-1-IN-22 is a potent inhibitor of the programmed cell death-1 (PD-1)/programmed cell death-ligand 1 (PD-L1) interaction, with an IC50 of 92.3 nM.

Sulfamethoxypyridazine (CL 13494) is a sulfanilamide antibacterial agent.

BMS-1166-N-piperidine-CO-N-piperazine dihydrochloride, a resorcinol di-Ph ether scaffold-based programmed cell death-1 (PD-1)/programmed cell death ligand 1 (PD-L1) inhibitor, inhibits the PD-1/PD-L1 interaction with an IC50 of 39.2 nM. It contains the target protein PD-1/PD-L1 ligand and PROTAC linker, which can be used to synthesize PROTAC PD-1/PD-L1 degrader-1 and has anticancer activity. Additionally, it serves as a diluent for the preparation of tablets for direct compression.