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-[[5-amino-2-[[2-(2,6-diaminohexanoylamino)-4-methylpentanoyl]amino]-5-oxopentanoyl]amino]-3-sulfanylpropanoic acid .
user
C20H38N6O6S
assistant