You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[6-(3-chloro-5-fluoro-4-methylphenyl)-4-[4-(methylaminomethyl)anilino]quinolin-3-yl]butan-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H27ClFN3O
assistant