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-3-(4-hydroxyphenyl)propanoyl]amino]-3-sulfanylpropanoyl]amino]-3-hydroxypropanoyl]amino]butanedioic acid .
user
C19H26N4O9S
assistant