You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-fluoro-5-[1-[4-fluoro-1-[(2-methylpropan-2-yl)oxycarbonyl]piperidin-4-yl]ethylamino]-4-(trifluoromethyl)benzoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H25F5N2O4
assistant