You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 1-[2-[methyl-[2-(4-methylphenyl)quinoline-4-carbonyl]amino]acetyl]piperidine-4-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H31N3O4
assistant