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 tert-butyl 5-[3-(2-aminopyrimidin-5-yl)imidazo[1,2-b]pyridazin-6-yl]-2,5-diazabicyclo[2.2.1]heptane-2-carboxylate is given. What is its corresponding molecular formula?
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C20H24N8O2
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