RSV-IN-1 is an inhibitor of human respiratory syncytical virus (hRSV) and reduced the virus infectivity with IC50 value of 0.11 μM.
The concentration of P13 that reduces the number of RSV plaques (IC50 is 0.11 μM,in HEp-2 cells ). The concentration of P13 that reduces the viability of HEp-2 by CC50 is 310 μM. The selective index (CC50/IC50) values is 2818 for P13. These escape plaques are of smaller size and of non-syncytial phenotype as compared to plaques formed in the absence of inhibitor.