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 (2R)-2-methyl-N-[(1R)-2-methyl-1-[3-(trifluoromethyl)phenyl]propyl]butanediamide is given. What is its corresponding molecular formula?
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C16H21F3N2O2
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