You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named N-[4-[3-(dimethylamino)propanoylamino]phenyl]-3-[4-(trifluoromethyl)phenyl]propanamide is given. What is its corresponding molecular formula?
user
C21H24F3N3O2
assistant