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 (1R,2R)-N-[3-[2-(6,7-dihydro-4H-thieno[3,2-c]pyridin-5-yl)anilino]-3-oxopropyl]-2-methylcyclopropane-1-carboxamide is given. What is its corresponding molecular formula?
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C21H25N3O2S
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