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-[[1-(2-amino-3-carboxypropanoyl)pyrrolidine-2-carbonyl]amino]-4-methylsulfanylbutanoyl]amino]-3-methylbutanoic acid .
user
C19H32N4O7S
assistant