You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named (E)-N-(2,2-dioxo-6-oxa-2lambda6-thiaspiro[4.5]decan-9-yl)-3-(4-propan-2-ylphenyl)prop-2-enamide is given. What is its corresponding molecular formula?
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C20H27NO4S
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