The antiviral activity and cytotoxicity of Q7R against viruses were determined by cytopathic effect (CPE) reduction method recently reported [15] . Also, the effect of Q7R on PEDV-induced CPE was observed by cytopathic effect (CPE) reduction method recently reported [15] . Ribavirin was used as positive, and was solublized in dimethylsulfoxide (DMSO) used as negative control.