... and barks contain Alkaloids, Saponins, Tannins, Glycosides Combined anthraquinones, Anthraquinone derivatives, Terpenes, Flavonoids , Reducing sugars, Ketones, Pentoses, Monosaccharide, General Carbohydrates, and ... has been found to be an effective mosquito repellent.Neem derivatives neutralise nearly 500 pests worldwide, including insects, mites, ticks, and ...