Compounds of formula (I), or a salt or prodrug thereof, wherein R.sup.1 represents H, C.sub.1-4 alkyl or CH.sub.2 COOH; R.sup.2 represents H or C.sub.1-4 alkyl, with the proviso that R.sup.1 and R.sup.2 are not both H; R.sup.3 and R.sup.4 each independently rely resent H, C.sub.1-, alkyl. C.sub.2-6 alkenyl C.sub.1-6 alkoxy, halo or trifluoromethyl; A.sup.1, A.sup.2, A.sup.3, and A.sup.4 each independently represent H, C.sub.1-6 alkyl, C.sub.1-6 alkenyl, C.sub.1-6 alkoxy, halo or trifluoromethyl; and A.sup.5 and A.sup.6 each independently represent H or C.sub.1-4 are tachykinin antagonists useful ##STR1##
化合物的分子式(I),或其盐或前药,其中R.sup.1代表H,C.sub.1-4烷基或CH.sub.2 COOH;R.sup.2代表H或C.sub.1-4烷基,但R.sup.1和R.sup.2不能同时为H;R.sup.3和R.sup.4各自独立地代表H,C.sub.1-,烷基。C.sub.2-6烯基C.sub.1-6烷氧基,卤素或三
氟甲基;A.sup.1,A.sup.2,A.sup.3和A.sup.4各自独立地代表H,C.sub.1-6烷基,C.sub.1-6烯基,C.sub.1-6烷氧基,卤素或三
氟甲基;而A.sup.5和A.sup.6各自独立地代表H或C.sub.1-4是有效的缓释肽拮抗剂。