urechitoxin

from The Century Dictionary.

• noun A colorless, crystalline, very bitter, poisonous glucoside, C₁₃-H₂₀O₅, contained in the leaves of Urechites suberecta, a West Indian plant belonging to the dogbane family.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Chem.) A poisonous glucoside found accompanying urechitin, and extracted as a bitter white crystalline substance.

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

• noun chemistry A poisonous glucoside found accompanying urechitin.