You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 9-[4-[2-(2-carbazol-9-yl-4-cyanophenyl)phenyl]cyclohepta-1,5-dien-1-yl]-4b-methyl-2,3,4,8a-tetrahydro-1H-carbazole-2,6-dicarbonitrile into its molecular formula.
user
C47H37N5
assistant