You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-[3-(4,6,7,8,9,9a-hexahydro-1H-quinolizin-2-yl)-2-methyl-1-benzofuran-5-yl]-2-methylbutan-1-one into its molecular formula.
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C23H29NO2
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