You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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2-(1,5-dimethyl-3-oxo-2-phenylpyrazol-4-yl)-N'-hydroxy-3,5-dioxo-1,2,4-triazine-6-carboximidamide is the IUPAC name of a molecule. Please give its molecular formula.
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C15H15N7O4
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