You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 6-[9,9-dimethyl-7-[3-(9-phenylcarbazol-3-yl)phenyl]fluoren-2-yl]phenanthro[9,10-b]pyrazine;6-[9,9-dimethyl-7-[4-(9-phenylcarbazol-3-yl)phenyl]fluoren-2-yl]phenanthro[9,10-b]pyrazine;10-[9,9-dimethyl-7-[3-[4-(9-phenylcarbazol-3-yl)phenyl]phenyl]fluoren-2-yl]phenanthro[9,10-b]pyrazine;6-[3-[4-[3-(9-phenylcarbazol-3-yl)phenyl]phenyl]phenyl]phenanthro[9,10-b]pyrazine;6-[3-[4-[4-(9-phenylcarbazol-3-yl)phenyl]phenyl]phenyl]phenanthro[9,10-b]pyrazine into molecular formula.
user
C275H181N15
assistant