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 2,2-dimethyl-1-[1-[2-(2-methylpyridin-3-yl)acetyl]-4,11-dioxa-1,8-diazaspiro[5.6]dodecan-8-yl]but-3-yn-1-one is given. What is its corresponding molecular formula?
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C22H29N3O4
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