You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
12-[6-(3-cyanocarbazol-9-yl)pyridin-2-yl]-[1]benzofuro[2,3-a]carbazole-10-carbonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C37H19N5O
assistant