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 [4-methyl-3-(1-methylimidazol-2-yl)piperazin-1-yl]-(3-methylthiophen-2-yl)methanone using the IUPAC nomenclature.
user
C15H20N4OS
assistant