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 N-[2-chloro-4-[(1R,2R,6R,7R)-3,5-dioxo-4-azatricyclo[5.2.1.02,6]dec-8-en-4-yl]phenyl]thiophene-2-carboxamide .
user
C20H15ClN2O3S
assistant