You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 3-[(2-aminoacetyl)amino]-4-[[1-[[1-carboxy-2-(1H-imidazol-5-yl)ethyl]amino]-4-methyl-1-oxopentan-2-yl]amino]-4-oxobutanoic acid is given. What is its corresponding molecular formula?
user
C18H28N6O7
assistant