6a-Nitro-6-(2,2,7,7-tetramethyltetrahydro-3a<i>H</i>-bis[1,3]dioxolo[4,5-<i>b</i>:4′,5′-<i>d</i>]pyran-5-yl)-6a,6b,7,8,9,11a-hexahydro-6<i>H</i>-spiro[chromeno[3,4-<i>a</i>]pyrrolizine-11,11′-indeno[1,2-<i>b</i>]quinoxaline]
Acta crystallographica. Section E