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 2-(2,4-dichlorophenoxy)-1-[4-[6-(dimethylamino)-2-methylpyrimidin-4-yl]piperazin-1-yl]ethanone .
user
C19H23Cl2N5O2
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