You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-fluoro-4-[2-[(3S)-4-[4-(4-fluorophenyl)phthalazin-1-yl]-3-methylpiperazin-1-yl]-2-oxoethyl]benzonitrile;hydrochloride The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H24ClF2N5O
assistant