You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 2-[[2-[[5-amino-2-[(2,4-diamino-4-oxobutanoyl)amino]-5-oxopentanoyl]amino]-4-carboxybutanoyl]amino]-4-methylpentanoic acid .
user
C20H34N6O9
assistant