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-amino-3-(methoxyamino)phenyl]ethyl]-3-[2-methoxy-5-(trifluoromethyl)phenyl]urea is given. What is its corresponding molecular formula?
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C18H21F3N4O3
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