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-ethylphenyl)ethyl]-3-[(2S)-2-hydroxy-2-(1-methylpyrazol-4-yl)ethyl]urea is given. What is its corresponding molecular formula?
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C17H24N4O2
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