You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (5S,10R)-9-[2-(1H-indol-3-yl)acetyl]-10-(4-methoxyphenyl)-1,9-diazaspiro[4.5]decan-2-one into molecular formula.
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C25H27N3O3
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