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-[[1-(2,4-difluorophenyl)-3,5-dimethylpyrazol-4-yl]methyl]-N'-methyl-N'-propan-2-ylethane-1,2-diamine .
user
C18H26F2N4
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