You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 3-[(2-amino-3-phenylpropanoyl)amino]-4-[2-[(1-carboxy-2-phenylethyl)carbamoyl]pyrrolidin-1-yl]-4-oxobutanoic acid .
user
C27H32N4O7
assistant