N-acylpeptides are disclosed of the formula: ##STR1## wherein R.sup.1 is alkanoyloxy or alkenoyloxy; R.sup.2 is alkyl or alkenyl; R.sup.3 and R.sup.4 are each lower alkyl, hydroxy(lower)alkyl, ar(lower)alkyl, esterified carboxy(lower)alkyl, carboxy(lower)alkyl, protected amino(lower)alkyl or amino(lower)alkyl; R.sup.5 is hydrogen, hydroxy(lower)alkyl, protected amino(lower)alkyl, amino(lower)alkyl, carboxy(lower)alkyl or esterified carboxy(lower)alkyl; R.sup.6 is carboxy, esterified carboxy or sulfo(lower)alkyl; A.sup.1, A.sup.2 and A.sup.3 are each bond or lower alkylene; and m and n are each an integer of 0 or 1; or its pharmaceutically acceptable salt. These compounds have anti-complementary activity and fibrinolytic activity, and are useful as therapeutic agents for immune-complex diseases or autoimmune diseases such as nephritis, rheumatic diseases, systemic lupus erythematosus, etc. and thrombosis such as cerebral apoplexy, coronary insufficiency, pulmonary embolism, etc.
本发明揭示了以下式子的N-酰基肽:##STR1## 其中R.sup.1是脂肪酰氧基或烯酰氧基;R.sup.2是烷基或烯基;R.sup.3和R.sup.4分别是低烷基,羟基(低)烷基,芳基(低)烷基,酯化的羧基(低)烷基,羧基(低)烷基,保护的
氨基(低)烷基或
氨基(低)烷基;R.sup.5是氢,羟基(低)烷基,保护的
氨基(低)烷基,
氨基(低)烷基,羧基(低)烷基或酯化的羧基(低)烷基;R.sup.6是羧基,酯化的羧基或
磺酸(低)烷基;A.sup.1,A.sup.2和A.sup.3分别是键或低烷基;m和n分别是0或1的整数;或其药学上可接受的盐。这些化合物具有抗补体活性和纤溶活性,并可用作免疫复合物疾病或自身免疫疾病(如肾炎,风湿病,系统性红斑狼疮等)以及血栓形成(如脑卒中,冠状动脉不足,肺栓塞等)的治疗剂。