You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 4-[4-(difluoromethoxy)phenyl]-N-(4-ethoxyphenyl)-3-(2-methoxyethyl)-1,3-thiazol-2-imine into its molecular formula.
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C21H22F2N2O3S
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