You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 9-[(2-methylpropan-2-yl)oxycarbonylamino]-2,8,18-trioxo-1,7,17-triazatricyclo[17.3.0.03,7]docos-12-ene-16-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H40N4O7
assistant