You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[4-([1,3]oxazolo[4,5-b]pyridin-2-yl)piperazin-1-yl]-2-pyridin-3-ylethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H17N5O2
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