You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 2-[2-[(3,4-dichlorophenyl)methoxy]phenyl]-N-(2-methoxyethyl)-1,3-thiazole-4-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C20H18Cl2N2O3S
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