You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 5,6-difluoro-3-[1-(4-methoxy-1-methylcyclohexyl)piperidin-4-yl]-1H-benzimidazol-2-one;hydrochloride into molecular formula.
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C20H28ClF2N3O2
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