You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[4-[(2S)-2-amino-3-(2,3-dihydroindol-1-yl)-3-oxopropyl]-3-chloro-5-methylphenyl] 2-methylpropyl carbonate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H27ClN2O4
assistant