You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7,7-dimethyl-3-[4-(10-naphthalen-1-ylanthracen-9-yl)phenyl]fluoreno[2,3-b][1]benzofuran;11,11-dimethyl-3-[4-(10-naphthalen-2-ylanthracen-9-yl)phenyl]fluoreno[3,2-b][1]benzofuran;7,7-dimethyl-2-[4-(10-naphthalen-1-ylanthracen-9-yl)phenyl]fluoreno[4,3-b][1]benzothiole;14,14-dimethyl-6-[4-(10-naphthalen-2-ylanthracen-9-yl)phenyl]-9-thiapentacyclo[11.7.0.02,10.03,8.015,20]icosa-1(13),2(10),3(8),4,6,11,15,17,19-nonaene;7,7-dimethyl-9-[4-(10-phenylanthracen-9-yl)phenyl]fluoreno[4,3-b][1]benzofuran;12,12-dimethyl-2-[4-(10-phenylanthracen-9-yl)phenyl]fluoreno[1,2-b][1]benzofuran The above is the IUPAC name of a molecule. Write its molecular formula.
user
C298H200O4S2
assistant