You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name N-[2-[(4-chlorophenyl)methyl]pyrazol-3-yl]-2-(6-oxo-3-phenylpyridazin-1-yl)acetamide ?
user
C22H18ClN5O2
assistant