You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[(6aR,10R,10aR,11aS)-8-carbamoyl-10-(dimethylamino)-4,6a-dihydroxy-5,6,7,9-tetraoxo-5a,10,10a,11,11a,12-hexahydrotetracen-1-yl]naphthalene-1-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C32H28N2O9
assistant