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 1-(4-ethyl-6,7-dihydro-4H-thieno[3,2-c]pyridin-5-yl)-2-[4-(4-methylphenyl)sulfonylpiperazin-1-yl]ethanone .
user
C22H29N3O3S2
assistant