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 2-[difluoro-(5-fluoropyridin-2-yl)methyl]-4-N-(5-methyl-1H-pyrazol-3-yl)quinazoline-4,7-diamine .
user
C18H14F3N7
assistant