phenyl 5-deoxy-2-O-<(diphenylhydrazono)acetyl>-5-phenylseleno-1-seleno-β-L-xylofuranoside

2,5-anhydro-1,6-dideoxy-7-O-<(1,1-dimethylethyl)diphenylsilyl>-6-(2,2-diphenylhydrazino)-D-glycero-L-ido-heptitol