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 [4-(difluoromethyl)-1-(2-methylpropyl)pyrazol-3-yl]-[(2S)-2-pyridin-4-ylpyrrolidin-1-yl]methanone .
user
C18H22F2N4O
assistant