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 2-(4-methylsulfonyl-2-pyridin-2-ylpiperazin-1-yl)-3H-imidazo[4,5-c]pyridine is given. What is its corresponding molecular formula?
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C16H18N6O2S
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