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 5-chloro-4-[3-[3-chloro-4-[5-(trifluoromethyl)pyridin-2-yl]oxyphenyl]propyl]-6-(difluoromethyl)-2-methylpyrimidine .
user
C21H16Cl2F5N3O
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