Nemertean worms contain toxins that are used to paralyze their prey and to deter potential predators. Hoplonemerteans often contain pyridyl alkaloids like anabaseine that act through nicotinic acetylcholine receptors and crustacean chemoreceptors. The chemical reactivity of anabaseine. the first nemertean alkaloid to be identified. https://www.perfumetank.com/product-category/carpet-spot-gum-removers/