Catsyn offer gram to tons of 4'-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-YL)-[1,1'-biphenyl]-4-carbaldehyde | CAS 1040424-52-9, its formula is C19H21BO3, molecular weight is 308.18g/mol and the purity is usually NLT 98%.