You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[2-[[3-[[1-[(2-methylpropan-2-yl)oxycarbonyl]-4,5-dihydroimidazol-2-yl]amino]benzoyl]amino]acetyl]amino]propanoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H27N5O6
assistant