You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[4-[2-[4-(3,4-dimethylphenyl)-2,5-dioxo-4-phenylimidazolidin-1-yl]acetyl]phenyl]propanamide into its molecular formula.
user
C28H27N3O4
assistant