You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2-[3-(3,4-dichlorophenyl)-1-(3-methoxybenzoyl)pyrrolidin-3-yl]ethyl]-4-phenylpiperidine-4-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C32H34Cl2N2O4
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