Two new prenylated flavanones, 2 S-3'-(2-hydroxy-3-methylbut-3-enyl)licoflavone-4'-methyl ether ( 3) and 2 S-3'-(2-hydroxy-3-methylbut-3-enyl)abyssinone II ( 4), and four known flavanones ( 1, 2, 5, 6) were isolated from the stem bark of Erythrina addisoniae. The structures were elucidated on the
Influenza occurs with seasonal variations and reaches the peak prevalence in winter causing the death of many people worldwide. A few inhibitors of viral neuraminidase, including amantadine, rimantadine, zanamivir, and oseltamivir, have been used as influenza therapy. However, as drug-resistant
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