1-(2,2-Dimethoxyethyl)-8-nitro-1,2,3,5,6,7-hexahydroimidazo[1,2-a]pyridin-5-ol

In the title compound, C11H19N3O5, the six-membered ring displays a half-chair conformation and the imidazolidine ring is essentially planar (r.m.s. deviation = 0.088 Å). An intermolecular hydrogen bond between the hydroxy O atom and a nitro O atom stabilizes the crystal packing