You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(5-amino-3-methylpyrazol-1-yl)-N-[[2-(6-methylpyridin-3-yl)oxypyridin-3-yl]methyl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H20N6O2
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