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 (3'aR,7'aS)-3',3',3'a,7'a-tetramethylspiro[1,3-dioxolane-2,2'-1,4-dihydroindene]-5'-one is given. What is its corresponding molecular formula?
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C15H22O3
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