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 (13aS,14S)-3-ethyl-6,7-dimethoxy-9,11,12,13,13a,14-hexahydrophenanthro[9,10-f]indolizin-14-ol is given. What is its corresponding molecular formula?
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C24H27NO3
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