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-[[1-[6-amino-2-[(2-amino-3-methylpentanoyl)amino]hexanoyl]pyrrolidine-2-carbonyl]amino]-3-sulfanylpropanoic acid .
user
C20H37N5O5S
assistant