You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named N-[2-[[(E)-3-(2-ethyl-1-benzofuran-3-yl)prop-2-enoyl]amino]ethyl]furan-2-carboxamide is given. What is its corresponding molecular formula?
user
C20H20N2O4
assistant