You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-carbamoyl-1-(2-chlorophenyl)pyrazol-4-yl]-2-(2-methylpyridin-4-yl)-1,3-oxazole-4-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H15ClN6O3
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