You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[C-(2-hydroxy-1-methylindol-3-yl)-N-[4-(1-methylimidazol-4-yl)phenyl]carbonimidoyl]benzonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H21N5O
assistant