saccharone

from The Century Dictionary.

• noun The crystalline lactone, C₆-H₁₀O₅ + H₂O, of saccharonic acid, from which it. is formed when a solution is evaporated by heat or in a desiccator. It melts at 145–146° C.

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

• noun A white crystalline substance, C6H8O6, obtained by the oxidation of saccharin, and regarded as the lactone of saccharonic acid.
• noun An oily liquid, C6H10O2, obtained by the reduction of saccharin.

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

• noun organic chemistry the lactone of saccharonic acid