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-(1-benzothiophen-2-yl)-2-hydroxyethyl]-2-methyl-3-[(3,4,5-trimethoxyphenyl)methyl]guanidine is given. What is its corresponding molecular formula?
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C22H27N3O4S
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