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-[4-[3-(2-aminoethylamino)quinoxalin-6-yl]oxyphenyl]-3-(4-chloro-3-fluorophenyl)urea is given. What is its corresponding molecular formula?
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C23H20ClFN6O2
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