You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[5-(2-fluoro-4,6-dimethylphenyl)-1,2,4-oxadiazol-3-yl]-2,3-dimethylbenzoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H17FN2O3
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