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-[4-methylsulfanyl-1-oxo-1-[1-[4-(propanoylamino)phenyl]ethylamino]butan-2-yl]-3-nitrobenzamide .
user
C23H28N4O5S
assistant