GPR183 antagonist-2 (compound 32) is a selective GPR183 antagonist with good water solubility and excellent pharmacokinetic properties. GPR183 antagonist-2 significantly reduces paw and joint swelling and gene expression of pro-inflammatory cytokines (MCP-1, MMPs, and VEGF) in a collagen-induced arthritis (CIA) mouse model in a dose-dependent manner. GPR183 antagonist-2 can be used in the study of autoimmune diseases.