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-hydroxy-2-oxoacetate;5-(2-methylsulfanylethyl)-3-pyridin-4-yl-4,5-dihydro-1H-1,2,4-triazin-4-ium-6-one is given. What is its corresponding molecular formula?
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C13H16N4O5S
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