You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-fluoro-2-[[(1R,5S)-9-methyl-3-oxa-9-azabicyclo[3.3.1]nonan-7-yl]oxy]benzoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H18FNO4
assistant