You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-chloro-N-[6-(4-methoxyphenyl)sulfanyl-1,3-dimethyl-2-oxobenzimidazol-5-yl]benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H20ClN3O3S
assistant