You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-amino-2-[[2-[[2-(2-aminopropanoylamino)-3-sulfanylpropanoyl]amino]-4-carboxybutanoyl]amino]-5-oxopentanoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H27N5O8S
assistant