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 N-butyl-2-[4-(2,3-dichlorophenyl)sulfonylpiperazin-1-yl]-N-(1,1-dioxothiolan-3-yl)acetamide .
user
C20H29Cl2N3O5S2
assistant