Objective To synthesize the derivatives of quaternary benzophenanthridine alkaloids (QBAs) sanguinarine (1) and chelerythrine (2), and evaluate their in vitro anti-HBV activities. Methods Derivatives were synthesized with sanguinarine and chelerythrine as starting materials and their anti-HBV activities were evaluated, namely, inhibiting the secretion of hepatitis B surface antigen (HBsAg), hepatitis Be antigen (HBeAg), and HBV DNA replication on Hep G 2.2.15 cells. Results Sanguinarine and chelerythrine signiifcantly inhibited HBsAg and HBeAg ...