You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-chloro-N-ethyl-N-[1-[3-(4-methylphenyl)-4-oxoquinazolin-2-yl]ethyl]benzamide by IUPAC nomenclature, provide its molecular formula.
user
C26H24ClN3O2
assistant