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 1H-indol-3-yl-(4-thiophen-2-yl-6,7-dihydro-4H-thieno[3,2-c]pyridin-5-yl)methanone using the IUPAC nomenclature.
user
C20H16N2OS2
assistant