<unk>  <unk>  is an extremely potent cardio- and neurotoxic steroidal alkaloid found in certain species of beetles, birds, and frogs. The name is from the Greek word . Structurally-related chemical compounds are often referred to collectively as<unk> s. It is an extremely poisonous alkaloid. In certain frogs, this alkaloid is present mostly on the skin. Such frogs are among those used for poisoning darts.<unk>  binds to and irreversibly opens the sodium channels of nerve cells and prevents them from closing, resulting in paralysis and death. No antidote is known.
Batrachotoxin
Psalmotoxin
Staphylotoxin
Jingzhaotoxin
Vanillotoxin
Conotoxin
Bungarotoxin
Maitotoxin