The invention provides compounds of the general formula:
(in which R1 is the residue of glycine or D-alanine, and all other amino-acid residues are in the L-form, X1 and X2, which may be the same or different, are OH or NH2 and n is 0 or 1) and their physiologically acceptable salts.
The compounds of the invention are capable of inhibit- ing the myelopoietic system of humans and animals, thereby protecting said system against attack by cytotoxic drugs.
本发明提供通式如下的化合物:
(其中 R1 为甘
氨酸或
D-丙氨酸残基,所有其他
氨基酸残基均为 L-形式,X1 和 X2(可相同或不同)为 OH 或 NH2,n 为 0 或 1)及其生理上可接受的盐。
本发明的化合物能够抑制人类和动物的骨髓造血系统,从而保护上述系统免受细胞毒性药物的攻击。