The Collaborative International Dictionary of English v.0.48:

Saccharone \Sac"cha*rone\, n. [Saccharin + lactone.] (Chem.)
   (a) A white crystalline substance, C6H8O6, obtained by the
       oxidation of saccharin, and regarded as the lactone of
       saccharonic acid.
   (b) An oily liquid, C6H10O2, obtained by the reduction of
       saccharin.
       [1913 Webster]