Two New Lignans with Activity against Influenza Virus from the Medicinal Plant <i>Rhinacanthus nasutus</i>

Abstract

Two new lignans, rhinacanthin E (1) and rhinacanthin F (2), were isolated from the aerial parts of the plant Rhinacanthus nasutus. Their structures were established by detailed spectroscopic analysis. These compounds show significant antiviral activity against influenza virus type A.