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 (2S)-N-(1-carbamoylindol-3-yl)-2-[2-(5-chloropyridin-3-yl)acetyl]-1,3-thiazolidine-3-carboxamide .
user
C20H18ClN5O3S
assistant