You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-amino-5-[[1-[[1-[(1-carboxy-2-hydroxypropyl)amino]-1-oxopropan-2-yl]amino]-1-oxo-3-phenylpropan-2-yl]amino]-5-oxopentanoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H30N4O8
assistant