You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[5-(5-fluoropentyl)-2,3-dihydrothiophen-2-yl]-5-[[(2S)-1-methylazetidin-2-yl]methoxy]pyridine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H27FN2OS
assistant