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 (6S)-1-[2-(2-oxopyrrolidin-1-yl)ethyl]-6-(propan-2-ylamino)-5,6,7,8-tetrahydroquinolin-2-one .
user
C18H27N3O2
assistant