You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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2-[[2-amino-3-[3-(5-fluoropyridin-2-yl)-1,2,4-oxadiazol-5-yl]-2-methylpropanoyl]amino]cyclohexene-1-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
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C18H20FN5O4
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