You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-[3-(2,4-dioxo-1,3,8-triazaspiro[4.5]decan-8-yl)-3-oxopropyl]-2,4,6-trimethylbenzenesulfonamide by IUPAC nomenclature, provide its molecular formula.
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C19H26N4O5S
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