You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(1,5-dimethyl-3-oxo-2-phenylpyrazol-4-yl)-3-imino-5-phenylpyridazine-4-carbonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H18N6O
assistant