(8-Pivaloyl-5,6,7,8-tetrahydro-1,8-naphthyridin-3-yl)boronic acid pinacol ester2,2-Dimethyl-1-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydro-1,8-naphthyridin-1(2H)-yl)propan-1-one2,2-Dimethyl-1-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydro-1,8-naphthyridin-1(2H)-yl)propan-1-one