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-[(2-methylpropan-2-yl)oxycarbonyl-(2-thiophen-2-ylethynyl)amino]ethyl-propan-2-ylamino]-2-oxoacetic acid .
user
C18H24N2O5S
assistant