You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named methyl 2-[[(1R,4R)-4,7,7-trimethyl-2,3-dioxobicyclo[2.2.1]heptane-1-carbonyl]amino]-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate is given. What is its corresponding molecular formula?
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C21H25NO5S
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