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Background: Hepatocellular carcinoma (HCC) is one of the least curable malignancies worldwide.Developing new therapeutic and preventive strategies could be effective in the prognosis and treatment of HCC.Wentilactone B (EN-48-57) is one of the six derivatives separated from Aspergillus wentii (EN-48),and it has been proved that Wentilactone B exerted a more significant antibacterial and cytotoxic activity in several tumor cell lines,especially in human hepatoma cell line (SMMC-7721).