[en] Gamma-radiolosis of D-glucose in aqueous solution under anaerobic condition was investigated. D-glucose was significantly decomposed by action of a hydroxyl radical, a primary radiolytic product of water. Under anaerobic condition, glucose radicals formed by hydrogen abstraction of hydroxyl radical were dehydrated to give deoxygenated sugars, and a part of the radicals followed disproportionation reaction to afford dicarbonyl sugars. Among the products formed through these reactions, 2-deoxy-D-arabinohexono-1, 4-lactone (G in N₂=0.6, G in N₂O=0.8), 3-deoxy-D-erythrohexosulose and other 3-deoxy sugars as deoxygenated compounds, and D-arabinohexosulose and D-xylohexos-5-ulose as dicarbonyl compounds were identified. From these results, the radiolytic scheme of D-glucose in the absence of oxygen was proposed. (auth.)