scyllite

from The Century Dictionary.

• noun A crystalline hexose found in the kidneys and livers of sharks, skates, etc. It has a slightly sweetish taste and does not reduce Fehling's solution.

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

• noun (Chem.) A white crystalline substance of a sweetish taste, resembling inosite and metameric with dextrose. It is extracted from the kidney of the dogfish (of the genus Scyllium), the shark, and the skate.

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

• noun organic chemistry A substance resembling inosite and metameric with dextrose, extracted from the kidney of the dogfish, the shark, and the skate.