peucedanin

from The Century Dictionary.

• noun A non-azotized neutral vegetable principle, C₁₂H₁₂O₃, discovered in the root of Peucedanum officinale, or sea-sulphurwort. It forms delicate white prisms, which are fusible, and soluble in alcohol and ether.
• noun A tasteless crystalline compound, C₁₆H₁₆O₄, found in the root of Peucedanum officinale and Imperatoria Ostruthium.

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

• noun (Chem.) A tasteless white crystalline substance, extracted from the roots of the sulphurwort (Peucedanum), masterwort (Imperatoria), and other related plants; -- called also imperatorin.

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

• noun organic chemistry A tasteless white crystalline substance extracted from the roots of the sulphurwort (Peucedanum), masterwort (Imperatoria), and related plants.