You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(3-chloro-2-methylphenyl)-4-hydroxy-3-(7-methoxy-1-benzofuran-2-carbonyl)-2-pyridin-3-yl-2H-pyrrol-5-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H19ClN2O5
assistant