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 (5S,9S)-7,7,9-trimethyl-3-[2-oxo-2-(2,4,6-trimethylphenyl)ethyl]-1,3-diazaspiro[4.5]decane-2,4-dione is given. What is its corresponding molecular formula?
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C22H30N2O3
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