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)-N-[(2E)-2-[cyano-[4-methyl-6-(trifluoromethyl)pyrimidin-2-yl]methylidene]-1,3-dihydrobenzimidazol-5-yl]-1-methylpyrrolidine-2-carboxamide is given. What is its corresponding molecular formula?
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C21H20F3N7O
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