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-[4-(hydroxymethyl)phenyl]ethyl]-3-[3-[methyl(propan-2-yl)amino]phenyl]urea is given. What is its corresponding molecular formula?
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C20H27N3O2
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