You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as N-[2-[5-[3-(4-phenylpiperazin-1-yl)propylsulfamoyl]thiophen-2-yl]ethyl]acetamide using the IUPAC nomenclature.
user
C21H30N4O3S2
assistant