You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[5-[2-fluoro-5-(morpholin-4-ylmethyl)phenyl]-2-(4-methylpiperazin-1-yl)phenyl]-6-oxo-3H-pyridazine-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H31FN6O3
assistant