You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2-fluoro-4-(3-phosphanylpyrido[2,3-b]pyrazin-8-yl)oxyphenyl]-3-[5-(trifluoromethyl)pyridin-3-yl]propan-2-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H15F4N4O2P
assistant