Shanghai Natural Bio-engineering Co., Ltd, export branch of Hunan Keyuan Bio-products co., Ltd, established in 2003, is a professional large-scale high-tech manufacturer of raw materials for nutraceuticals, nutritional supplements, and pharmaceuticals. Plant extracts, Active Pharmaceutical Ingredient (API) & intermediates are our focused areas. Key products include Artemisinin, Artemether, Artesunate, Dihydroartemisinin, Lumefantrine,Diosmin, Hesperidin, Prednisolone, Progesterone, etc.