This invention relates to the extraction of 8-hydroxyquinoline from a plant called centaurea diffusa (knapweed) for the purpose of manufacture of an aqueous

摘要

A natural source of 8-hydroxyquinoline is disclosed and the process described therein, which involves steam distillation, results in the extraction of 8-hydroxyquinoline, as well as the compounds cnicin and (-) catechin from the herbage and root material of a plant called Centaurea Diffusa (Knapweed). The hydrosol obtained from this process that contains the above three components finds use as an organic spray for insect control. Furthermore, the said hydrosol may be further treated to produce an aqueous based metal ion chelating composition that consists 8-hydroxyquinoline, useful for the treatment of bacterial and various medical conditions.