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 [2-[[2-(tert-butylamino)-2-oxoethyl]-methylamino]-2-oxoethyl] 3-[(3-chlorophenyl)sulfonylamino]propanoate .
user
C18H26ClN3O6S
assistant