In this paper

we synthesized 1

2: 4

5-di-O-isopropylidene-β-D-erythro-2

3-hexodiulo-2

6-pyranose oxime(2) and benzoylhydrazone(3) by the condensation of 1

2: 4

5-di-O-isopropylidene-β-D-erythro-2

3-hexodiulo-2

6-pyranos(1) with NH_2OH and PhCONHNH2. Their structures and the configuration of 2 and the interconversional isomer(6) of 3 were confirmed depending on their elemental analysis and IR

~1H

13C-NMR spectrum datum.