You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 6-(2-fluoro-4-methoxyphenyl)-2-[2-oxo-2-(4-pyridin-2-ylpiperazin-1-yl)ethyl]pyridazin-3-one ?
user
C22H22FN5O3
assistant