You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [2-[2-(8-oxa-3-azabicyclo[3.2.1]octan-3-yl)ethyl]indazol-5-yl]-pyrrolidin-1-ylmethanone into its molecular formula.
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C20H26N4O2
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