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The hepatitis B virus (HBV) capsid assembly modulators (CAMs) have been developed as effective anti-HBV agents in the treatment of chronic HBV infection by targeting the HBV core protein and inducing the formation of aberrant or morphologically normal capsid. However, some CAMs have been observed adverse events such as ALT flares and rash. Therefore, finding new CAMs is of great importance. In this report, we synthesized N-sulfonylpiperidine-3-carboxamides (SPCs) derivatives and evaluated their anti-HBV activities. Among the SPC derivatives, compound C-49 notably suppressed HBV replication in HepAD38, HepG2-HBV1.3 and HepG2-NTCP cells. Moreover, treatment with C-49 for 12 days exhibited potent anti-HBV activity (100ámg/kg; 2.42 log reduction of serum HBV DNA) in HBV-transgenic mice without apparent hepatotoxicity. Our findings provided a new SPC derivative as HBV capsid …