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-[2-oxo-2-[(4S)-4-thiophen-2-yl-6,7-dihydro-4H-thieno[3,2-c]pyridin-5-yl]ethyl]-2,3-dihydroindole-5-sulfonamide .
user
C21H21N3O3S3
assistant