You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-([1]benzofuro[3,2-c]carbazol-5-yl)-3-[2-([1]benzofuro[3,2-c]carbazol-5-yl)-4-isocyanophenyl]benzonitrile is the IUPAC name of a molecule. Please give its molecular formula.
user
C50H26N4O2
assistant