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-[(6-chloro-5-fluoropyrimidin-4-yl)methyl]-4-[3-fluoro-5-(trifluoromethyl)phenyl]-5-[[(2R)-2-methylpyrrolidin-1-yl]methyl]-1,3-thiazole .
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C21H18ClF5N4S
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