4,4,5,5-tetramethyl-2-(9,9'-spirobi[9H-fluoren]-4-yl)-1,3,2-dioxaborolane; CAS No.: 1161009-89-7; As a chemical online mall, ChemShuttle offers 4,4,5,5-tetramethyl-2-(9,9'-spirobi[9H-fluoren]-4-yl)-1,3,2-dioxaborolane, a versatile intermediate for organic synthesis.