You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name N-[1-(3-chloro-4-fluorophenyl)-2-hydroxyethyl]-2-[(4-methylpyrimidin-5-yl)amino]-6,8-dihydro-5H-pyrido[3,4-d]pyrimidine-7-carboxamide into its molecular formula.
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C21H21ClFN7O2
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