A peptide derivative of the formula: ##STR1## is a novel compound having antagonism against three endothelin isopeptides. A 2-cyanotryptophan or a protected compound thereof, is an intermediate for the preparation of the endothelin antagonist.
公式为:##STR1## 的肽衍
生物是一种新型化合物,具有对三种内皮素同工酶的拮抗作用。2-
氰基色
氨酸或其保护化合物是内皮素拮抗剂制备的中间体。