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 4-[(2-amino-3-sulfanylpropanoyl)amino]-5-[[1-(1-carboxyethylamino)-4-methylsulfanyl-1-oxobutan-2-yl]amino]-5-oxopentanoic acid .
user
C16H28N4O7S2
assistant