You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (4-phenylphenyl)-[4-[6-(1,2,4-triazol-1-yl)pyridazin-3-yl]piperazin-1-yl]methanone into its molecular formula.
user
C23H21N7O
assistant