You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[1-[4-cyano-3-(trifluoromethyl)phenyl]piperidin-4-yl]-4-(4-phenylpiperazin-1-yl)butanamide;methane The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H36F3N5O
assistant