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 1-N-[2-(5-chloro-1H-pyrrolo[2,3-b]pyridin-3-yl)-5-fluoropyrimidin-4-yl]-3-N-methylcyclohexane-1,3-diamine;ethane is given. What is its corresponding molecular formula?
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C20H26ClFN6
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