You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 3-(2-fluorophenyl)-1-[[(5R)-3-(2-methoxyphenyl)-4,5-dihydro-1,2-oxazol-5-yl]methyl]-1-prop-2-enylurea by IUPAC nomenclature, provide its molecular formula.
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C21H22FN3O3
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