You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 5-amino-2-[[2-[[5-amino-2-[(2-amino-4-methylpentanoyl)amino]-5-oxopentanoyl]amino]-4-methylsulfanylbutanoyl]amino]-5-oxopentanoic acid into its molecular formula.
user
C21H38N6O7S
assistant