1-Fluoro-2,4,6-trimethylpyridinium tetrafluoroborate109705-14-847 % similar Mesitylene108-67-836 % similar 3,5-Difluorotoluene117358-51-733 % similar Mesitol527-60-631 % similar 2,6-Dichloro-4-methylphenol2432-12-430 % similar