You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named (2'R,3S,3'R,5'R)-6-chloro-5'-(2-methylpropyl)-2-oxo-3'-phenylspiro[1H-indole-3,4'-pyrrolidine]-2'-carboxylic acid is given. What is its corresponding molecular formula?
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C22H23ClN2O3
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