Compound Toxicity MNTD* ug/ml Anti-viralactivityon HRV14 ug/ml Anti-viralactivityon HRV19 ug/ml Protection index(PI) EMEB 50.0 0.07 0.07 >700/>700 Pirodavir 3.1 0.012 0.006 250/>500

*MNTD: Maximum Non-Toxic Dose

Table 2: Cytotoxic and anti-Rhinovirus activity of compound EMEB and Pirodavir.