You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-ethyl-2-[3-(8-methyl-8-azabicyclo[3.2.1]octan-3-yl)-1,2,4-oxadiazol-5-yl]butan-1-amine into its molecular formula.
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C16H28N4O
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