Aprepitant is a selective neurokinin-1 (NK1) receptor antagonist. Structurally, it is a member of the morpholine class of compounds. Chemically, aprepitant is (2R,3S)-3-[(2R)-2-[(3,5-bis(trifluoromethyl)phenyl)methoxy]-3-(4-fluorophenyl)morpholin-4-yl]-(1,2,3,4-tetrahydro-2-isoquinolinyl)ethanone. This unique chemical structure allows aprepitant to selectively bind to and block the activity of NK1 receptors in the central nervous system, particularly in the brainstem and vomiting center.Aprepitant is a medication primarily used for the prevention of nausea and vomiting associated with chemotherapy and certain other medical procedures. Buy high quality Aprepitant from Molsyns Research. Molsyns Research is one of the leading manufacturer and exporter of Aprepitant.