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 6-chloro-4-[4-[(2-fluoro-5-methylphenyl)methyl]piperazin-1-yl]-1-methyl-2-oxo-1,5-naphthyridine-3-carbonitrile ?
user
C22H21ClFN5O
assistant