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 (4-ethyl-2-pyrimidin-2-yl-1,3-thiazol-5-yl)-[(1S,5R)-1,3,3-trimethyl-6-azabicyclo[3.2.1]octan-6-yl]methanone .
user
C20H26N4OS
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