You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(2S,4S,6R)-2-(4-fluorophenyl)-4-methyl-6-[3-(trifluoromethyl)phenyl]oxan-4-yl]-2-methylpropanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H25F4NO2
assistant