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-[2-[[2-(azetidin-1-yl)-6-ethylpyrimidin-4-yl]amino]pyridin-4-yl]-2,6-dichlorobenzamide into its molecular formula.
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C21H20Cl2N6O
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