You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R)-1-[1-[(1S,3R)-3-(2,2,2-trifluoroethylamino)cyclopentyl]imidazo[4,5-c][1,5]naphthyridin-2-yl]ethanol The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H20F3N5O
assistant