4-(4-Methylpiperazin-1-yl)phenylboronic acid, pinacol ester4-(4-甲基-1-哌嗪基)苯硼酸频哪醇酯4-(4-Methyl-1-piperazinyl)benzeneboronic acid pinacol ester1-Methyl-4-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]piperazine4-(4-METHYLPIPERAZIN-1-YL)PHENYLBORONIC ACID PINACOL ESTER4-(4-Methylpiperazin-1-yl)benzeneboronic acid, pinacol ester2-[4-(4-Methylpiperazin-1-yl)phenyl]-4,4,5,5-tetramethyl-1,3,2-dioxaborolane