You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[1-(7-chloro-3-methyl-4-oxoquinazolin-2-yl)ethyl]-N-ethyl-2-(4-methoxyphenyl)acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H24ClN3O3
assistant