We have previously shown that helioxanthin can suppress human hepatitis Bvirus gene expression. A series of helioxanthin analogues were synthesized and evaluated for their anti-hepatitisBvirus activity. Modifications at the lactone rings and methylenedioxy unit of helioxanthin can modulate the antiviral activity. Among them, compound 32 is the most effective anti-HBV agent. Compound 32 can suppress