2-Fluoro-2-methylpropane 353-61-7 4-01-00-00286 (Beilstein Handbook Reference) BRN 1730812 EINECS 206-538-4 Propane, 2-fluoro-2-methyl- T-BUTYLFLUORIDE TL 468 t-Butyl fluoride tert-Butyl fluoride