Rotenone is a naturally occurring insecticide and piscicide derived from the roots and stems of several plant species. It is an isoflavonoid compound with the empirical formula C23H22O6. Rotenone has various agricultural and pharmaceutical uses including as a pesticide for potato beetles and other insect pests, and to kill invasive fish species. It decomposes readily in sunlight and is toxic to fish and other aquatic life at low doses, but has relatively low toxicity to humans. Prolonged exposure may potentially cause neurological effects however. Common formulations include powdered extracts in dusts or solutions for spraying.