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-[3-[2-[2,3-difluoro-4-(4-methylpiperazin-1-yl)anilino]pyrrolo[1,2-a][1,3,5]triazin-8-yl]phenyl]prop-2-enamide is given. What is its corresponding molecular formula?
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C26H25F2N7O
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