5H-Benzo(a)pyrrolo(2,3-d)carbazole-10,11-diol, 6,7,7a,8,12b,13-hexahydro- 6,7,7a,8,12b,13-Hexahydro-5H-benzo(a)pyrrolo(2,3-d)carbazole-10,11-diol DK1230600