You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 4-methyl-5-[2-(2-thieno[2,3-d]pyrimidin-6-yl-2,8-diazaspiro[4.5]decan-8-yl)ethyl]-3H-2-benzofuran-1-one by IUPAC nomenclature, provide its molecular formula.
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C25H28N4O2S
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