You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-carbazol-9-yl-9-[4-(2-chloro-3-fluorophenyl)-6-phenyl-1,3,5-triazin-2-yl]carbazole into molecular formula.
user
C39H23ClFN5
assistant