You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 4-N-(3,4-dihydro-2H-pyrido[3,2-b][1,4]oxazin-6-yl)-5-fluoro-2-N-[3-methyl-4-(4-methylpiperazin-1-yl)phenyl]pyrimidine-2,4-diamine into molecular formula.
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C23H27FN8O
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