You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 3-amino-3-[4-(1,8-diazaspiro[5.5]undecan-8-yl)-1H-pyrrolo[2,3-b]pyridin-3-yl]prop-2-enethial by IUPAC nomenclature, provide its molecular formula.
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