You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 3-[4-[(6-chloro-1,3-dimethylbenzotriazol-3-ium-4-yl)diazenyl]-N-ethylanilino]propanenitrile;acetate .
user
C21H24ClN7O2
assistant