You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (1R)-N-[(1S)-1-[3-(3-fluoro-4-methylphenyl)-1,2,4-oxadiazol-5-yl]ethyl]-1-[4-(trifluoromethyl)phenyl]ethanamine .
user
C20H19F4N3O
assistant