You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (6-chloro-2-methylspiro[3,4-dihydropyrrolo[1,2-a]pyrazine-1,4'-piperidine]-1'-yl)-(3,4-diethoxyphenyl)methanone by IUPAC nomenclature, provide its molecular formula.
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C23H30ClN3O3
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