You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-[3-(4-phenylpiperazin-1-yl)quinoxalin-2-yl]-2-thiophen-2-ylsulfonylacetonitrile .
user
C24H21N5O2S2
assistant