You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 7-chloro-N-[1-[[1-cyano-2-(5-oxo-4-azaspiro[2.4]heptan-6-yl)ethyl]amino]-3-(1-methylcyclopropyl)-1-oxopropan-2-yl]-5-methoxy-1H-indole-2-carboxamide into molecular formula.
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C26H30ClN5O4
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