You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule tert-butyl (2'R,3R,4'S)-6-chloro-4'-(3-chlorophenyl)-1'-ethyl-2'-(2-methylphenyl)-2,6'-dioxospiro[indole-3,3'-piperidine]-1-carboxylate into molecular formula.
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C32H32Cl2N2O4
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