Ichthyothereol is a toxic polyyne compound found in the leaves and flowers of several plants in South and Central America. These plant sources and their extracts are known for their toxic effects on fish, and have long been used by various native tribes in the lower Amazon basin for fishing.
The compounds of every Wikipedia article carrying a Chembox or a Drugbox, refreshed daily, with the values their infoboxes give. The pages need JavaScript; the API does not.