asebotoxin

from The Century Dictionary.

• noun An extremely poisonous neutral crystalline compound, C₃₁H₅₀O₁₀, found in Japan in the leaves of Pieris japonica and in the United States in laurel (Rhododendron maximum). It is often fatal to sheep and cows.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun One of the grayanotoxins; grayanotoxin I.