You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[3-[(1R)-1-[(6-dimethylphosphoryl-2-methylpyrido[3,4-d]pyrimidin-4-yl)amino]ethyl]-2-fluorophenyl]-2,2-difluoro-N-methylacetamide into its molecular formula.
user
C21H23F3N5O2P
assistant