You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 4-chloro-N-[1-[3-(2-ethoxyphenyl)-4-oxoquinazolin-2-yl]ethyl]-N-methyl-3-nitrobenzenesulfonamide into its molecular formula.
user
C25H23ClN4O6S
assistant