You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule 3-carbazol-9-yl-9-[2-(3-carbazol-9-ylphenyl)phenyl]pyrido[2,3-b]indole;5-[9-[2-(3-carbazol-9-ylphenyl)phenyl]carbazol-3-yl]pyrido[3,2-b]indole;9-[2-(3-carbazol-9-ylphenyl)phenyl]-3-pyrido[2,3-b]indol-9-ylpyrido[2,3-b]indole;9-[2-(3-carbazol-9-ylphenyl)phenyl]-3-pyrido[3,4-b]indol-9-ylpyrido[2,3-b]indole ?
user
C186H118N18
assistant