You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
12-(6-methylcyclohexa-1,3-dien-1-yl)-5-(1,3,5-triazin-2-yl)indolo[3,2-c]carbazole The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H21N5
assistant