You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[N-[4-[2-(ethylamino)ethyl]phenyl]-C-phenylcarbonimidoyl]-5-nitro-1,3-dihydroindol-2-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H24N4O3
assistant