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 (2S)-2-[(4-chlorophenyl)methyl-methylamino]-2-phenyl-N-[3-(trifluoromethyl)phenyl]acetamide is given. What is its corresponding molecular formula?
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C23H20ClF3N2O
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