You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 3-[(4S,5S)-1,3-dimethyl-4,5-diphenylimidazolidin-2-yl]-2-ethyl-1,2,6,7,12,12b-hexahydroindolo[2,3-a]quinolizine into molecular formula.
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C34H38N4
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