Polypeptide derivatives of formula (1),acid-addition salts thereof and complexes thereof, having the activities for inhibiting bone calcium absorption, for lowering the blood level of calcium, as analgesics, for inhibiting secretion of the gastric juice.
Calcium metabolism improving agent can be prepared by formulating, at least one of the novel polypeptide derivatives, acid-addition salts thereof and complexes thereof, together with a proteolytic enzyme inhibitors and/or pharmaceutically acceptable acids.
The calcium metabolism improving agents are quite effective as agents for curing hypercalcemia, for curing Peget's disease, for curing osteoporosis, analgetic agent, antioulcerative agent and the like.
式(1)的
多肽衍
生物、其酸加成盐及其复合物,具有抑制骨
钙吸收、降低血
钙水平、镇痛、抑制胃液分泌的活性。
钙代谢改善剂可通过将至少一种新型
多肽衍
生物、其酸加成盐及其复合物与蛋白
水解酶
抑制剂和/或药学上可接受的酸一起配制而成。
钙代谢改善剂作为治疗高
钙血症、治疗佩吉氏病、治疗骨质疏松症、镇痛剂、抗溃疡剂等药物非常有效。