You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[6-chloro-2-(4-methylphenyl)benzotriazol-5-yl]-2-(4-chlorophenoxy)-2-methylpropanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H20Cl2N4O2
assistant