2-(1-Piperazinyl)pyridine-4-boronic acid pinacol ester2-(1-哌嗪基)-4-吡啶硼酸频哪醇酯2-(1-Piperazinyl)-4-pyridineboronic acid pinacol ester2-(1-哌嗪基)吡啶-4-硼酸频哪醇酯2-(Piperazin-1-yl)pyridine-4-boronic acid, pinacol ester2-(1-哌嗪)吡啶-4-硼酸频哪酯2-(1-Piperazino)pyridine-4-boronic acid pinacol ester4-[4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-2-pyridyl]piperazine