You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 1-cyano-3-[(3S)-2-oxo-1-(2-oxo-2-pyrrolidin-1-ylethyl)azepan-3-yl]-2-[[4-(trifluoromethyl)phenyl]methyl]guanidine by IUPAC nomenclature, provide its molecular formula.
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C22H27F3N6O2
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