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 N-(6-amino-4-methylpyridin-2-yl)-8-chloro-3,4-dihydro-1H-pyrazino[1,2-a]benzimidazole-2-sulfonamide is given. What is its corresponding molecular formula?
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C16H17ClN6O2S
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