You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 6-(3,5-dimethylpyrazol-1-yl)-N-[2-[3-(trifluoromethyl)phenoxy]ethyl]pyrazin-2-amine into its molecular formula.
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C18H18F3N5O
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