Used in the development of hepatitis B virus (HBV) treatments, this compound acts as a potent inhibitor of HBV replication. It functions by targeting the viral capsid assembly, preventing the proper formation of the virus core, which is essential for viral DNA synthesis. Due to this mechanism, it has served as a key lead molecule in the discovery and optimization of capsid assembly modulators. These modulators are now a promising class of antiviral agents in clinical development for chronic hepatitis B, aiming to achieve functional cures by reducing the levels of circulating virus and viral antigens.