You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[(3,4-dichlorophenyl)methyl-[2-(2-methoxy-N-methylsulfonyl-5-nitroanilino)acetyl]amino]-N-methylpropanamide into its molecular formula.
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C21H24Cl2N4O7S
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