You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[3-fluoro-2-(triazol-2-yl)phenyl]-[(3R)-3-[5-(trifluoromethyl)pyridin-2-yl]oxypiperidin-1-yl]methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H17F4N5O2
assistant