You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 1-[2-[(5-methylsulfonyl-1,3-thiazol-2-yl)carbamoyl]phenoxy]carbonyloxyethyl 2-methylpropanoate by IUPAC nomenclature, provide its molecular formula.
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C18H20N2O8S2
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