You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 2-ethyl-6,8-dimethoxy-1'-(3-methyl-1-benzofuran-2-carbonyl)spiro[5,10-dihydroimidazo[1,5-b][2]benzazepine-3,4'-piperidine]-1-one into molecular formula.
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C30H33N3O5
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