You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(4-methyl-2-oxo-6,7,8,9-tetrahydro-[1]benzofuro[3,2-g]chromen-3-yl)-N-pyridin-2-ylacetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H20N2O4
assistant