4,4,5,5-Tetramethyl-2-(5-methyl-2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-1,3,2-dioxaborolane 250mg

4,4,5,5-Tetramethyl-2-(5-methyl-2,3-dihydrobenzo[b][1,4]dioxin-6-yl)-1,3,2-dioxaborolane 250mg