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4-(Methoxycarbonyl)thiophene-2-boronic acid pinacol ester Methyl thiophene-2-boronic acid pinacol ester-4-carboxylate (4-(METHOXYCARBONYL)THIOPHEN-2-YL)BORONIC ACID PINACOL ESTER Methyl 4-(tetraMethyl-1,3,2-dioxaborolan-2-yl)thiophene-2-carboxylate Methyl 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiophene-3-carboxylat Methyl 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiophene-3-carboxylate 5-(4,4,5,5-Tetramethyl-[1,3,2]dioxaborolan-2-yl)-thiophene-3-carboxylic acid methyl ester 3-Thiophenecarboxylic acid, 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-, methyl ester