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 N-(2-cyanopropan-2-yl)-7,7-difluoro-1-(4-oxidopyrazin-4-ium-2-yl)-5,6-dihydro-4H-indazole-3-carboxamide is given. What is its corresponding molecular formula?
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C16H16F2N6O2
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