You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2'S,3R,3'S,5'S)-N,N-dimethyl-2-oxo-5'-phenyl-3'-propan-2-ylspiro[1H-indole-3,4'-pyrrolidine]-2'-carboxamide into molecular formula.
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C23H27N3O2
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