You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-fluoro-9-methyl-2-(4-methylpiperazin-1-yl)-5-oxo-8,9-dihydro-[1,3]thiazolo[3,2-a][1,8]naphthyridine-6-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H19FN4O3S
assistant