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-[(2S)-2-[(2R)-2-thiophen-3-ylpyrrolidine-1-carbonyl]-2,3-dihydroindol-1-yl]ethanone .
user
C19H20N2O2S
assistant