You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-ethyl-6-[ethyl(oxan-4-yl)amino]-N-[(4-methoxy-6-methyl-2-oxo-1H-pyridin-3-yl)methyl]-2-[(4-methylpiperazin-1-yl)methyl]-1-benzofuran-4-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C32H45N5O5
assistant