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 benzyl N-[(2S)-1-(2-methyl-2,3-dihydroindol-1-yl)-1-oxopropan-2-yl]carbamate using the IUPAC nomenclature.
user
C20H22N2O3
assistant