You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[4-fluoro-3-(3-morpholin-4-ylquinoxaline-6-carbonyl)phenyl]-3-[3-(trifluoromethyl)phenyl]urea The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H21F4N5O3
assistant