3-Carboxyphenylboronic acid, pinacol ester3-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)benzoic acid3-Carboxybenzeneboronic acid, pinacol ester3-羧基苯硼酸频哪醇酯3-Carboxyphenylboronic acid pinacol ester3-(4,4,5,5-四甲基-1,3,2-二氧杂硼烷-2-基)苯甲酸3-Carboxyphenylboronic acid pinacol ester