N-TERMINAL BROMODOMAIN OF HUMAN BRD4 WITH 5-(5-aminopyridin-3-yl)-8-(((3R,4R)-3-((1,1-dioxidotetrahydro-2H-thiopyran-4-yl)methoxy)piperidin-4-yl)amino)-3-methyl-1,7-naphthyridin-2(1H)-one