You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule [(1R,5R)-6-[(2-ethylsulfanylpyrimidin-5-yl)methyl]-3,6-diazabicyclo[3.2.2]nonan-3-yl]-pyridin-2-ylmethanone .
user
C20H25N5OS
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