6-Chloropyridine-2-boronic acid, pinacol ester6-Chloro-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine2-Chloro-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine6-氯吡啶-2-硼酸频哪酯6-Chloropyridine-2-boronic acid pinacol ester6-CHLOROPYRIDINE-2-BORONIC ACID PINACOL ESTER