You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-(2,3-dihydro-1-benzofuran-2-ylmethylamino)-2-(2,6-dioxopiperidin-3-yl)isoindole-1,3-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H19N3O5
assistant