You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-(2-chloro-6-fluorophenyl)-N,5-dimethyl-N-[2-(2-methylphenoxy)ethyl]-1,2-oxazole-4-carboxamide into its molecular formula.
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C21H20ClFN2O3
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