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 N-[1,6-diethyl-3-(4-methylphenyl)-6,7-dihydro-5H-pyrrolo[2,3-b]pyridin-4-ylidene]-2-methylpropanamide into molecular formula.
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C22H29N3O
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