You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-amino-2-[[5-amino-2-[[2-[(2-amino-3-sulfanylpropanoyl)amino]-3-sulfanylpropanoyl]amino]-5-oxopentanoyl]amino]-5-oxopentanoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H28N6O7S2
assistant