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 N-(2-chloro-4,6-dimethylphenyl)-2-[4-([1,2,4]triazolo[4,3-a]pyridin-3-yl)piperidin-1-yl]acetamide .
user
C21H24ClN5O
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