3-Hy­droxy-2-[(2-hy­droxy-4,4-dimethyl-6-oxocyclo­hex-1-en-1-yl)(3-nitro­phen­yl)meth­yl]-5,5-dimethyl­cyclo­hex-2-en-1-one

Each of the cyclohexenone rings in the title compound, C(23)H(27)NO(6), adopts a half-chair (envelope) conformation with the C atom carrying the methyl groups lying out of the plane defined by the five remaining C atoms; the O atoms lie to the same side of the mol­ecule as the respective >C(CH(3))(2) atoms. The hy­droxy and carbonyl O atoms face each other and are orientated to allow for the formation of two intra­molecular O—H⋯O hydrogen bonds. In the crystal, the presence of C—H⋯O contacts leads to the formation of supra­molecular chains along the b axis. These aggregate into layers that stack along c.