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 [5-chloro-2-(triazol-2-yl)phenyl]-[2-(4,5-difluoro-1H-benzimidazol-2-yl)-2-methylpyrrolidin-1-yl]methanone is given. What is its corresponding molecular formula?
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C21H17ClF2N6O
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