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The crystal structure of the title compound, C 12 H 18 N 2 O 8 , exists as O—H⋯O hydrogen-bonded layers of mol­ecules running parallel to the  ab  plane. Each mol­ecule is a donor and acceptor for six hydrogen bonds. The absolute stereochemistry was determined by the use of  d -glucuronolactone as the starting material.

acta crystallographica. section e

(1R,2R,3S,6aS,7R,8R,9S,12aS)-1,2,3,7,8,9-Hexahydroxyperhydrodipyrido[1,2-a:1′,2′-d]pyrazine-6,12-dione