tert-Butyl 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenylcarbonate3-(叔丁氧羰氧基)苯硼酸频哪醇酯3-(tert-Butoxycarbonyloxy)phenylboronic acid pinacol ester3-(4,4,5,5-四甲基-1,3,2-二氧硼戊环-2-基)苯基碳酸叔丁酯tert-Butyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl carbonate