mannitan

from The Century Dictionary.

• noun The name of two compounds, C₆H₁₂O₅. They are formed by prolonged boiling of mannite with concentrated hydrochloric acid, and are distinguished as amorphous and crystalline. The former is semisolid and feebly dextrorotatory; the latter forms monoclinic tables and is strongly levorotatory.

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

• noun (Chem.) A white amorphous or crystalline substance obtained by the partial dehydration of mannite.

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

• noun organic chemistry A white amorphous or crystalline substance obtained by the partial dehydration of mannite.