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 6-bromo-3-[(5-chloro-2-ethylsulfonylphenyl)methyl]-7-(1,4-oxazepan-4-ylmethyl)quinazolin-4-one is given. What is its corresponding molecular formula?
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C23H25BrClN3O4S
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