You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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N-[[4-[(2,4-dichlorophenyl)methoxy]phenyl]methylideneamino]-5-fluoro-4-morpholin-4-ylpyrimidin-2-amine is the IUPAC name of a molecule. Please give its molecular formula.
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C22H20Cl2FN5O2
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