You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (4R)-4-[4-[1-[2-[ethyl(methyl)amino]pyrimidin-4-yl]pyrrolidin-3-yl]oxyphenyl]-1,1-difluoropentan-2-one .
user
C22H28F2N4O2
assistant