tert-Butyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl carbonate4-(叔丁氧羰氧基)苯硼酸频哪醇酯tert-Butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl Carbonate4-(tert-Butoxycarbonyloxy)phenylboronic acid pinacol ester4-(4,4,5,5-四甲基-1,3,2-二氧硼戊环-2-基)苯基碳酸叔丁酯