You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[2-[(6-bromo-2-ethyl-4-oxoquinazolin-3-yl)iminomethyl]-4-chlorophenoxy]-N-phenylacetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H20BrClN4O3
assistant