(R)-4-Benzyl-2-((R)-1-(3,5-bis(trifluoromethyl)phenyl)ethoxy)morpholin-3-one,(R)-4-Benzyl-2-((R)-1-(3,5-bis(trifluoromethyl)phenyl)ethoxy)morpholin-3-one,"(2R)-2-[(1R)-1-[3,5-Bis(trifluoromethyl)phenyl]ethoxy]-4-(phenylmethyl)-3-morpholinone, is the key 3-(4-Fluorophenyl)morpholine moiety used in the synthesis of NK1 receptor antagonist Aprepitant .",Aprepitant