Studies on new antiplatelet agents, WS-30581 A and B.

Studies on new antiplatelet agents, WS-30581 A and B. Studies on new vasodilators, WS-1228 A and B. I. Discovery, taxonomy, isolation and characterization. PI-083, a new platelet aggregation inhibitor. WS009 A and B, new endothelin receptor antagonists isolated from Streptomyces sp. No. 89009. I. Taxonomy, fermentation, isolation, physico-chemical properties and biological activities. Studies on WF-5239, a new potent platelet aggregation inhibitor. Sch 38519, a novel platelet aggregation inhibitor produced by a Thermomonospora sp. Taxonomy, fermentation, isolation, physico-chemical properties, structure and biological properties. WS-7338, new endothelin receptor antagonists isolated from Streptomyces sp. No. 7338. I. Taxonomy, fermentation, isolation, physico-chemical properties and biological activities. WS009 A and B, new endothelin receptor antagonists isolated from Streptomyces sp. No. 89009. II. Biological characterization and pharmacological characterization of WS009 A and B. WS-9659 A and B, novel testosterone 5.ALPHA.-reductase inhibitors isolated from a Streptomyces. I. Taxonomy, fermentation, isolation, physico-chemical characteristics. YM-254890, a Novel Platelet Aggregation Inhibitor Produced by Chromobacterium sp. QS3666