| abstract |
The invention relates to new substituted tricyclic pyrazolopyrimidine compounds of formula (I-a) or (I-b), which possess antiviral activity, in particular, have an inhibitory activity against respiratory syncytial virus replication (RSV). The present invention further relates to the preparation of such novel compounds, compositions containing such compounds, as well as compounds for use in the treatment of infections caused by a respiratory syncytial virus. |