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

Abstract
WS-30581 A and B are antiplatelet agents produced by a strain of Streptoverticillium waksmanii. The compounds were purified by solvent extraction and column chromatography, and identified as new pimprinine analogs on the basis of their physico-chemical properties. The producing organism produced pimprinine along with these compounds. Pimprinine and the 2 new analogs have potent inhibitory effects on rabbit platelet aggregation.