Fun, H.-K.Ooi, C.W.Malladi, S.Isloor, A.M.Shivananda, K.N.2026-02-052012Acta Crystallographica Section E: Structure Reports Online, 2012, 68, 2, pp. o380-16005368https://doi.org/10.1107/S1600536812000311https://idr.nitk.ac.in/handle/123456789/27067Two molecules make up the asymmetric unit of the title compound, C <inf>12</inf>H <inf>18</inf>N <inf>4</inf>O <inf>2</inf>, and both feature an intramolecular O - H?N hydrogen bond, which generates an S(6) ring. The diethylamino group of one of the molecules is disordered over two sets of sites in a 0.59 (2):0.41 (2) ratio. In the crystal, N - H?O hydrogen bonds link the molecules into sheets lying parallel to the ac plane and C - H?? interactions are also observed.data-to-parameterdisorder in main residuemean ?(C-C) = 0.006 ÅR factor = 0.068single-crystal X-ray studyT = 296 KwR factor = 0.220