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 [4-(5-chloro-6-oxo-2-pyridin-4-yl-1H-pyrimidin-4-yl)-1,4-diazepan-1-yl]methanesulfinic acid is given. What is its corresponding molecular formula?
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C15H18ClN5O3S
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