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 1-[[1-(4-fluorophenyl)pyrazol-4-yl]methyl]-1-methyl-3-[[(6R)-4-methyl-1,4-oxazepan-6-yl]methyl]urea .
user
C19H26FN5O2
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