You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(3-pyridin-3-yl-1,2,4-oxadiazol-5-yl)ethyl 3-chloro-6-(3,5-dimethylpyrazol-1-yl)pyridine-2-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H17ClN6O3
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