[O:1]=[CH:2][C@@H:3]([C@H:5]([C@H:7]([CH2:9]O)[OH:8])[OH:6])[OH:4].O.[NH2:12][NH2:13]>CO>[CH:9](=[N:12][NH2:13])[C@@H:7]([C@H:5]([C@H:3]([CH2:2][OH:1])[OH:4])[OH:6])[OH:8]A solution of 2.0 g of L-arabinose in 5 ml of methanol and 5 ml of hydrazine hydrate was stirred overnight and then evaporated in vacuo. A 5 ml portion of methanol was added to the residue. After standing overnight the oil solidified. The solid was collected and dried, giving 1.5 g of L-arabinose hydrazone.
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