You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 6,19-dimethylheptacyclo[13.11.1.12,10.03,8.016,21.023,27.014,28]octacosa-1,3(8),4,6,10,12,14(28),15(27),16(21),17,19,23,25-tridecaene-9,22-dione .
user
C30H18O2
assistant