https://www.mdpi.com/1420-3049/26/14/4217
Bufadienolides from the Skin Secretions of the Neotropical Toad Rhinella alata (Anura: Bufonidae):...
Toads in the family Bufonidae contain bufadienolides in their venom, which are characterized by their chemical diversity and high pharmacological potential....
from the skin