You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,2R)-N-[3-[[2-[(2,5-difluorophenyl)methyl]-4-methylpyrazol-3-yl]amino]-3-oxopropyl]-2-methylcyclopropane-1-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H22F2N4O2
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