Consider this response: These molecules are related to steroids, and have a similar carbon backbone.
What was the preceding dialog?
A 2 person conversation: -- What is known about Calotropin?; -- Calotropin  Calotropin is a toxic cardenolide found in plants in the family "Asclepiadoideae".; -- Do the plants contain any other toxins?; -- In extreme cases, calotropin poisoning can cause respiratory and cardiac failure.; -- Are there any other interesting aspects about this article?; -- Accidental poisoning is common in livestock who have ingested milkweed.; -- Do the plants affect humans?; -- Calotropin is commonly stored as a defense mechanism by insects that eat milkweeds as their main food source.; -- What are the properties of the compound?; -- Calotropin is a toxic compound and is classified as a cardenolide-type cardiac glycoside.; -- Is there any other toxins present?; -- 