The furaquinocins (AH, 1-8), isolated by 6mura and coworkers' at the Kitasato Institute (Tokyo) from the fermentation broth of Streptomyces sp. KO-3988, manifest wide-ranging biological effects, including in vitro cytotoxicity against HeLaS3 cells, 2 antihypertensive activity, and inhibition of platelet aggregation and c~ agulation.~ In 1992, as a prelude to total