You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 4-N-[5-[[(5-tert-butyl-1,2-oxazol-3-yl)amino]methyl]-2-fluorophenyl]-6-N-(2-morpholin-4-ylethyl)pyrimido[5,4-d]pyrimidine-4,6-diamine by IUPAC nomenclature, provide its molecular formula.
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C26H32FN9O2
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