You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-nitro-N-[2-oxo-6-(4-phenylpiperazin-1-yl)-1,3-dihydrobenzimidazol-5-yl]benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C24H22N6O4
assistant