2-(4-Methylpiperazin-1-yl)pyridine-5-boronic acid, pinacol ester2-(4-METHYLPIPERAZIN-1-YL)PYRIDINE-5-BORONIC ACID PINACOL ESTER2-(4-Methylpiperazin-1-yl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine1-Methyl-4-[5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl]piperazine6-(4-Methylpiperazin-1-yl)pyridine-3-boronic acid, pinacol ester