You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (4R,4aR,5aS,12aR)-7-(1-benzofuran-2-yl)-4-(dimethylamino)-1,10,11,12a-tetrahydroxy-3,12-dioxo-4a,5,5a,6-tetrahydro-4H-tetracene-2-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C29H26N2O8
assistant