1-[(6-Chloro­pyridin-3-yl)meth­yl]-10-nitro-1,2,3,5,6,7,8,9-octa­hydro-5,9-methano­imidazo[1,2-a]azocin-5-ol

In the title compound, C(16)H(19)ClN(4)O(3), the cyclo­hexane ring displays a chair formation and the tetra­hydro­pyridine ring displays an envelope conformation with the methyl­ene C atom as the flap; the imidazolidine ring also displays an envelope conformation with a methyl­ene C atom as the flap. In the crystal, O—H⋯N hydrogen bonds between hy­droxy groups and pyridine rings link inversion-related mol­ecules into dimers. Weak C—H⋯O hydrogen bonds further link the dimers into supra­molecular chains running along the c axis.