Cardenolide vs. Bufadienolide — What's the Difference?

A cardenolide is a type of steroid. Many plants contain derivatives, collectively known as cardenolides, including many in the form of cardenolide glycosides (cardenolides that contain structural groups derived from sugars).

Bufadienolide is a chemical compound with steroid structure. Its derivatives are collectively known as bufadienolides, including many in the form of bufadienolide glycosides (bufadienolides that contain structural groups derived from sugars).

(organic chemistry) Any of many steroid lactones present in plants as glycosides; they are all toxic, affecting the heart

Any of a class of toxic steroids present in some plants and secreted by some toads through the skin as a defense; sometimes present as a glycoside.