You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4R,4aR,5aS,12aS)-4-(dimethylamino)-1,10,11,12a-tetrahydroxy-7-[(E)-2-(4-methylphenyl)ethenyl]-3,12-dioxo-4a,5,5a,6-tetrahydro-4H-tetracene-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C30H30N2O7
assistant