1-(2-Fluoro-5-methyl-phenyl)-3-[4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-urea can be used ... .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%. 1-(2-fluoro-5-methylphenyl)-3-[4-(4,4,5,5-tetramethyl-1,3 ...