You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[[4-chloro-1-(2,3-dichlorophenyl)-2,5-dioxopyrrol-3-yl]amino]-N-(4-ethoxyphenyl)benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H18Cl3N3O4
assistant