sinistrin

from The Century Dictionary.

• noun Same as inulin.
• noun A colorless, pulverulent, levorotatory compound, C₆H₁₀O₅, contained in the white or red sea-onion or squill, Urginea Scilla. It is probably identical with achroödextrine.

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

• noun (Chem.) A mucilaginous carbohydrate, resembling achroödextrin, extracted from squill as a colorless amorphous substance; -- so called because it is levorotatory.

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

• noun organic chemistry A mucilaginous carbohydrate extracted from squill.