Disclosed are (1) a cyclic hexapeptide represented by formula [I] or a salt thereof:
wherein X and Y each represent a-amino acid residues, A represents a D-acidic-a-amino acid residue, B represents a neutral-a-amino acid residue, C represents an L-a-amino acid residue and D represents a D-a-amino acid residue having an aromatic ring group; and (2) a pharmaceutical composition comprising the peptide represented by formula [I] or a pharmaceutically acceptable salt thereof as an active ingredient.
公开了 (1) 由式 [I] 表示的环六肽或其盐:
其中 X 和 Y 分别代表 a-
氨基酸残基,A 代表 D-酸性-a-
氨基酸残基,B 代表中性-a-
氨基酸残基,C 代表 L-a-
氨基酸残基,D 代表具有芳香环基的 D-a-
氨基酸残基;以及 (2) 一种药物组合物,其活性成分包含式 [I] 所代表的肽或其药学上可接受的盐。