The skin secretion of the giant leaf frog is known as Vacina do sapo (frog vaccine)  and contains the opioid peptides deltorphin, deltorphin I, deltorphin II and dermorphin.
Vacina do sapo (frog vaccine), found in the skin secretion of the giant leaf frog, includes opioid peptides like deltorphin, deltorphin I, deltorphin II, and dermorphin.