ABBOTT LABORATORIES; ENANTA PHARMACEUTICALS, INC.; CHEN, Hui-ju; MCDANIEL, Keith, F.; GREEN, Brian, E.; SHANLEY, Jason, P.; KRUGER, Albert, W.; GANDARILLA, Jorge; WELCH, Dennie, S.; CINK, Russell, D.; GAI, Yonghua; WANG, Guoqiang; OR, Yat, Sun Patent: WO2011/156337 A2, 2011 ; WO 2011/156337 A2