You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl 4-[3-[(dimethylamino)methyl]-5-(trifluoromethyl)phenoxy]piperidine-1-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H29F3N2O3
assistant