利奥西呱中间体; 2-[1-[(2-氟苯基)甲基]-1H-吡唑并[3,4-b]吡啶-3-基]-5-(苯基偶氮)-4,6-嘧啶二胺;2-(1-(2-Fluorobenzyl)-1H-pyrazolo[3,4-b]pyridin-3-yl)-5-(phenyldiazenyl)pyrimidine-4,6-diamine