You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance N-[2-(3,4-dichloroanilino)-2-oxoethyl]-N-methyl-3-(4-oxo-3H-quinazolin-2-yl)propanamide .
user
C20H18Cl2N4O3
assistant