Catsyn offer gram to tons of 2-(3,4-Dihydro-2H-pyran-5-YL)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane | CAS 1046811-99-7, its formula is C11H19BO3, molecular weight is 210.08g/mol and the purity is usually NLT 98%.