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 (4R)-N-[(S)-(4-fluorophenyl)-[(2R)-oxolan-2-yl]methyl]-4-methyl-6,7-dihydro-4H-thieno[3,2-c]pyridine-5-carboxamide is given. What is its corresponding molecular formula?
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C20H23FN2O2S
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