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 7-[[4-(3-chloro-4-fluorophenyl)pyrimidin-2-yl]amino]-N-hydroxy-5,6,7,8-tetrahydronaphthalene-2-carboxamide into molecular formula.
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C21H18ClFN4O2
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