You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 6-tert-butyl-8-[(3,4-dimethoxyphenyl)methylideneamino]-[1,2,4]triazolo[4,3-b][1,2,4]triazin-7-one by IUPAC nomenclature, provide its molecular formula.
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C17H20N6O3
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