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 [4-(2-hydroxyethyl)piperazin-1-yl]-[2-(4-phenyl-1,3-thiazol-2-yl)-3H-benzimidazol-5-yl]methanone is given. What is its corresponding molecular formula?
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C23H23N5O2S
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