You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 2-[(1R)-4,5-dimethoxy-3-oxo-1H-2-benzofuran-1-yl]-N-(1-methylsulfonyl-2,3-dihydroindol-6-yl)acetamide ?
user
C21H22N2O7S
assistant