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 (2S)-N-[4-(3,4-diethoxyphenyl)-1,2,5-oxadiazol-3-yl]-2-(2-fluorophenoxy)propanamide is given. What is its corresponding molecular formula?
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C21H22FN3O5
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