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 N-cyclopentyl-2-[2-(4-methoxyphenyl)-4-oxo-2,3-dihydro-1,5-benzothiazepin-5-yl]acetamide is given. What is its corresponding molecular formula?
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C23H26N2O3S
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