2,5-Dichloro-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine2,5-Dichloro-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine2,5-二氯吡啶-3-硼酸频哪酯2,5-Dichloropyridine-3-boronic acid pinacol ester2,5-Dichloro-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine