6,7,8,9-tetrahydro-4b,9b-dihydroxyindano[1,2-b]indoline-9,10-dione monohydrate

Abstract

In the title compound, C15H13NO4· H2O, the organic mol-ecule adopts a V-shaped conformation in which the dihedral angle between the five-membered rings is 68.33 (5)°. The cyclo-hexenone ring adopts an envelope conformation, with one of the methyl-ene C atoms displaced by 0.607 (4) Å from the plane through the other atoms. In the crystal, inter-molecular N - H⋯(O,O) and O - H⋯O hydrogen bonds link the components into (001) sheeets and C-H⋯O inter-actions and aromatic π-π stacking [centroid-centroid separation = 3.6176 (19) Å] help to consolidate the packing.