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 identified by 2-(3-carbazol-9-ylphenyl)pyridine-3,5-dicarbonitrile;3-(3-carbazol-9-ylphenyl)pyridine-2,6-dicarbonitrile;6-(3-carbazol-9-ylphenyl)pyridine-2,4-dicarbonitrile;6-(3-carbazol-9-ylphenyl)pyridine-2,5-dicarbonitrile;6-(3-carbazol-9-ylphenyl)pyridine-3,4-dicarbonitrile ?
user
C125H70N20
assistant