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'a-(3,4-dimethoxyphenyl)-4-(3-methoxyphenyl)-1'-methylspiro[1,3-dioxolane-2,6'-2,3,4,5,7,7a-hexahydroindole] is given. What is its corresponding molecular formula?
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C26H33NO5
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