You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
15-[2-(dimethylamino)ethyl]-12-[2-(dimethylamino)ethylamino]-15-azatetracyclo[7.7.1.02,7.013,17]heptadeca-1(17),2,4,6,8,10,12-heptaene-14,16-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H28N4O2
assistant