CL-385319

CL-385319 is an N-substituted piperidine compound with inhibitory activity against H5N1 avian influenza A virus infection. CL-385319 exhibited an IC50 of 27.03±2.54 μM against infection of highly pathogenic H5N1 virus in Madin-Darby canine kidney cells (MDCK) . CL-385319 had low cytotoxicity with a CC50 of 1.48 mM and was able to inhibit the entry of pseudoviruses carrying H5N1 strains from different sources, but had no inhibitory effect on the entry of VSV-G pseudotyped particles. Pseudoviruses with the M24A mutation in HA1 or the F110S mutation in HA2 were resistant to CL-385319, indicating that these two residues in the cavity region may be critical for the binding of CL-385319[1].