You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
propan-2-yl 4-[3-(6-methoxy-2-methylpyridin-3-yl)triazolo[4,5-d]pyrimidin-7-yl]oxypiperidine-1-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H25N7O4
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