You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 3-[(E)-2-[1-[(E)-6-hydroxy-5,6-dimethylhept-3-en-2-yl]-7a-methyl-1,2,3,3a,6,7-hexahydroinden-4-yl]ethenyl]-4-methylcyclohex-3-en-1-ol by IUPAC nomenclature, provide its molecular formula.
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C28H44O2
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