Antiviral activity of substituted homoisoflavonoids on enteroviruses.

The antiviral activity of homoisoflavonoids, a class of flavonoids, was determined in vitro against a large panel of enteroviruses. The inhibition of viral replication was monitored on BGM (Buffalo Green Monkey) cells, and the concentration required for 50% inhibition (IC50), as well as the selectivity index (SI) were determined. None of the substances were effective against Sabin type 1 poliovirus (PV1), but most of them showed a low cytotoxicity and a marked antiviral activity against Coxsackie virus B1, B3, B4, A9 and echovirus 30.