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 methyl 5-[(5-methyl-1H-1,2,4-triazol-3-yl)sulfanyl]pyrazine-2-carboxylate is given. What is its corresponding molecular formula?
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C9H9N5O2S
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