You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[1-(1-benzyl-4-phenylimidazol-2-yl)-2-methylpropyl]-6-(methylaminomethyl)-1,4-diazepane-2,3-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H33N5O2
assistant