You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 4-(5-bromo-2-fluorophenyl)sulfonyl-N-propyl-2,3-dihydro-1,4-benzoxazine-2-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C18H18BrFN2O4S
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