You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (4'aR,8'S,8'aR)-8'-methoxy-2',5,5-trimethylspiro[1,3-dioxane-2,4'-4a,5,8,8a-tetrahydronaphthalene]-1'-one by IUPAC nomenclature, provide its molecular formula.
user
C17H24O4
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