You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 3-(3,4a,5,7,8,8a-hexahydro-2H-pyrano[4,3-b][1,4]oxazin-4-ylsulfonyl)-5-bromobenzonitrile by IUPAC nomenclature, provide its molecular formula.
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C14H15BrN2O4S
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