You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[[5-[3-methoxy-4-(4-methylimidazol-1-yl)phenyl]-2-methyl-1,2,4-triazol-3-yl]amino]benzonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H19N7O
assistant