You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name ethyl N-[2-[(2,4-dimethylbenzoyl)amino]-4,5,6,7-tetrahydro-1-benzothiophene-3-carbonyl]carbamate into its molecular formula.
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C21H24N2O4S
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