<unk>  is a quaternary ammonium salt from the protoberberine group of benzylisoquinoline alkaloids found in such plants as<unk><unk> is, such as<unk><unk> is vulgaris (barberry),<unk><unk> is aristata (tree turmeric), Mahonia aquifolium (Oregon grape), Hydrastis canadensis (goldenseal), Xanthorhiza simplicissima (yellowroot), Phellodendron amurense (Amur cork tree), Coptis chinensis (Chinese goldthread), Tinospora cordifolia, Argemone mexicana (prickly poppy), and Eschscholzia californica (Californian poppy).<unk>  is usually found in the roots, rhizomes, stems, and bark. Due to its yellow color,<unk><unk> is species were used to dye wool, leather, and wood. Under ultraviolet light,<unk>  shows a strong yellow fluorescence, making it useful in histology for staining heparin in mast cells. As a natural dye,<unk>  has a color index of 75160.
Berberine
Ginkgo biloba
Bolesatine
Glycyrrhizin
Diacerein
Rodenticide
Folinic acid
Atractyloside