An experiment was made on the periodate oxidation of “Lycorisin”, a new crystalline glucofructan which was isolated from the bulb of
Lycoris radiata HERBERT, in comparison with inulin. Results obtained were as follows.
1. It was confirmed again that “Lycorisin” is a nonasaccharide consisted of one part of glucose, which exists as the non-reducing end-group residue, eight parts of fructose, and also no existence of the branched structures and glucose in the fructose chain in the Lycorisin molecule (see Table 1 and 2).
2. The “Oxidized-Lycorison” was crystallized by the NaIO
4-oxidation (see Figure 1 and Table 3).
This is shown by the NaIO
4-consumption, the variation of [α] D and viscosity and paper chromatograms in the course of periodate oxidation of “Lycorisin” (see Tables 4, 5, 6 and Figure 3).
3. It was confirmed that glucose exists as the non-reducing residue in the inulin molecule and the mole ratio of fructose: glucose is 34:1.
The “Oxidized-Inulin” was prepared as the form of crystalline (see Figure 2 and Table 3), NaIO
4-consumption, variation of [α] D and viscosity and paper chromatograms in the course of periodate oxidation of inulin (see Tables 4, 5, 6 and Figure 3) were also shown.
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