You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[[4-chloro-1-(3,5-dichlorophenyl)-2,5-dioxopyrrol-3-yl]amino]-N-(4-propan-2-ylphenyl)benzamide is the IUPAC name of a molecule. Please give its molecular formula.
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C26H20Cl3N3O3
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