You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
cyclobutyl-[2-[3-[2-(4-fluorophenoxy)ethyl]-1,2,4-oxadiazol-5-yl]pyrrolidin-1-yl]methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H22FN3O3
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