Abstract
A new butenolide isoaspulvinone E (1), together with two known butenolides aspulvinone E (2) and pulvic acid (3) were isolated from the marine-derived fungus, Aspergillus terreus Gwq-48. They showed significant anti-influenza A H1N1 virus activities, with IC50 values of 32.3, 56.9, and 29.1μg/mL, respectively. Moreover, only compound 1 exhibited effective inhibitory activity against H1N1 viral neuraminidase (NA), and docking of two isomers (1–2) into the active sites of NA showed that the E double bond Δ5(10) was essential to achieve activity.
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