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 2-(2,4-dichlorophenoxy)-N'-[6-[4-(4-fluorophenyl)piperazin-1-yl]-5-nitropyrimidin-4-yl]acetohydrazide .
user
C22H20Cl2FN7O4
assistant