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-[[2-[(2-amino-4-methylpentanoyl)amino]-3-hydroxybutanoyl]amino]-3-hydroxybutanoyl]amino]-3-(1H-imidazol-5-yl)propanoic acid .
user
C20H34N6O7
assistant