Revised Interpretation of the Methylation Data Concerning Melezitose

Revised Interpretation of the Methylation Data concerning Melezitose 

The presence of the pyranose ring in the two D-glucose units of melezitose was inferred by Zempl6n and Braun from good evidence, and made certain by Miss Leitch through the crystallization of the requisite amount of 2,3,4,6-tetramethyl-D-glucose from the scission products of the fully methylated trisaccharide. The revised interpretation of Miss Leitch s experimental data concerns only the structure of the 

D-fructose unit, which is now established as of the furanose type. A configurational formula for melezitose that is limited to the expression of these ring structures and leaves open the matter of a,ff classification is shown by XV. 

Recent work by Richtmyer and the writeri has confirmed this formula XV through a study of the oxidation of melezitose by per-iodic acid. They found that the oxidation resulted in the reduction of 4 moles of the acid to 4 moles of iodic acid for each mole of sugar, and the generation of 2 moles of formic acid no formaldehyde could be detected. It can be shown that these analytical measurements lead to this formula by an independent conclusive proof. 

The absence of formaldehyde from the oxidation products proves 

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