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 2-(5,6-dichloro-1H-benzimidazol-2-yl)-1,1,1-trifluoro-5-phenylpent-4-yn-2-ol is given. What is its corresponding molecular formula?
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C18H11Cl2F3N2O
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