You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 3-[[(2,2-dimethoxy-3H-1-benzofuran-7-yl)oxycarbonyl-methylamino]sulfanyl-propan-2-ylamino]propanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H30N2O7S
assistant