You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[2-[(1S)-1-[(2,6-diamino-5-cyanopyrimidin-4-yl)amino]ethyl]-4-oxo-3-phenylquinazolin-5-yl]butanoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H24N8O3
assistant