You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name 2-(4-ethylphenyl)-N-[(2-methoxyphenyl)methyl]-3-methyl-1-oxo-4H-pyrazino[1,2-a]indole-3-carboxamide into its molecular formula.
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C29H29N3O3
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