You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[2-[[2-[(2-amino-3-methylbutanoyl)amino]-3-(4-hydroxyphenyl)propanoyl]amino]propanoylamino]-3-(4-hydroxyphenyl)propanoic acid into molecular formula.
user
C26H34N4O7
assistant