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 4-(2,4-dioxo-1,3-diazaspiro[4.4]nonan-3-yl)-N-[4-(1H-indol-3-yl)-1,3-thiazol-2-yl]butanamide is given. What is its corresponding molecular formula?
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C22H23N5O3S
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