You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 2-[4-[(E)-3-(7,9-difluoro-2,4,4a,5-tetrahydro-1H-pyrazino[2,1-c][1,4]benzoxazin-3-yl)prop-1-enyl]-5-methylpyrazol-1-yl]pyrimidin-4-amine using the IUPAC nomenclature.
user
C22H23F2N7O
assistant