You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
bis(2,5-dioxopyrrolidin-1-yl) 5-[2-[2-[2-(phenylmethoxycarbonylamino)ethoxy]ethoxy]ethylcarbamoylamino]benzene-1,3-dicarboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C31H33N5O13
assistant