XENON PHARMACEUTICALS INC.; LIU, Shifeng; FOCKEN, Thilo; CHAHAL, Navjot; ZHANG, Zaihui; OBALLA, Renata, Marcella; FONAREV, Julia Patent: WO2013/64984 A1, 2013 ; Location in patent: Page/Page column 65 ; WO 2013/064984 A1