oreoselin

from The Century Dictionary.

• noun A crystalline substance, C₁₄H₁₂O₄, formed by warming peucedanin with acids or with alcoholic potash. It yields resorcinol and acetic acid when fused with caustic potash. It melts at 170° C.

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

• noun (Chem.) A white crystalline substance which is obtained indirectly from the root of an umbelliferous plant (Imperatoria Oreoselinum), and yields resorcin on decomposition.

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

• noun organic chemistry A white crystalline substance which is obtained indirectly from the root of an umbelliferous plant, Imperatoria oreoselinum, and yields resorcin on decomposition.