1-Fluoro-2,4,6-trimethylpyridinium tetrafluoroborate109705-14-8100 % similar 1-Fluoro-2,4,6-trimethylpyridinium triflate107264-00-649 % similar Mesitylene108-67-833 % similar 2,4,6-Trimethylpyridine108-75-831 % similar 3,5-Difluorotoluene117358-51-731 % similar Iodomesitylene4028-63-130 % similar