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 methyl N-[4,6-diamino-2-[1-[2-[amino-[(2-fluorophenyl)methyl]amino]pyridin-3-yl]ethenyl]pyrimidin-5-yl]oxy-N-methylcarbamate is given. What is its corresponding molecular formula?
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C21H23FN8O3
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