4,4,5,5-tetramethyl-2-(spiro[benzo[c]fluorene-7,9'-xanthen]-2'-yl)-1,3,2-dioxaborolane

4,4,5,5-tetramethyl-2-(spiro[benzo[c]fluorene-7,9'-xanthen]-2'-yl)-1,3,2-dioxaborolane ·