You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(1,3-benzodioxol-5-ylmethyl)-1-ethyl-6-fluoro-7-(4-methylpiperazin-4-ium-1-yl)-4-oxoquinoline-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H28FN4O4+
assistant