从无花果得到的低聚肽L-丙氨酸-L-缬氨酸-L-天冬酰胺-L-脯氨酸-L-异亮氨酸-L-精氨酸,L-亮氨酸-L-酪氨酸-L-脯氨酸-L-缬氨酸-L-赖氨酸,L-亮氨酸-L-缬氨酸-L-精氨酸及其加成盐都是新化合物。磨碎无花果肉,分离固体物质。无花果汁或含从果汁分离得到(分子量达10000)的部位的溶液,或二者的浓缩物是含上述有效成分的降压药。此种从无花果得到的低聚肽为极好的降压药。口服或非肠道内(如腹腔注射)给药。剂 L-valine-L-asparagine-L-proline-L-isoleucine-L-arginine, L-leucine- L-tyrosine-L-proline-L-valine-L-lysine, L-leucine-L-valine-L-arginine and their addition salts are all novel compounds . Ground fig meat to separate solid material. Fig juice or a solution containing a fraction isolated from fruit juice (molecular weight up to 10,000), or both, is a blood pressure-reducing drug containing the above-mentioned active ingredients. This oligopeptide obtained from figs is an excellent antihypertensive drug. Oral or parenteral (such as intraperitoneal injection) administration. Agent