You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 4-amino-5-[[1-[[1-[(1-carboxy-2-phenylethyl)amino]-1-oxo-3-phenylpropan-2-yl]amino]-3-hydroxy-1-oxobutan-2-yl]amino]-5-oxopentanoic acid by IUPAC nomenclature, provide its molecular formula.
user
C27H34N4O8
assistant