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 1-(2-chloro-5-methylphenoxy)-3-(3-methyl-2-propylbenzimidazol-3-ium-1-yl)propan-2-ol is given. What is its corresponding molecular formula?
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C21H26ClN2O2+
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