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 7-ethylsulfonyl-2-(piperidin-1-ylmethyl)-6,8-dihydro-5H-imidazo[1,2-a]pyrazine is given. What is its corresponding molecular formula?
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C14H24N4O2S
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