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-[(2-amino-3-sulfanylpropanoyl)amino]-3-sulfanylpropanoyl]amino]acetyl]amino]-3-methylbutanoic acid .
user
C13H24N4O5S2
assistant