... -[4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-urea can be used as intermediates to sy Our ... about 0.3% ,Any impurities not more than0.2%,1-(5-Fluoro-2-methyl-phenyl)-3-[4-(4,4,5,5-tetramethyl ... -[1,3,2]dioxaborolan-2-yl)-phenyl]-urea Less than 0.05 ...