You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule (4R)-N-[(4-propan-2-ylthiadiazol-5-yl)methyl]-2,3,4,5-tetrahydro-1-benzoxepine-4-carboxamide into molecular formula.
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C17H21N3O2S
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