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1.  1-[1-(Hydroxy­imino)eth­yl]-N-(2-methoxy­phen­yl)cyclo­propane­carboxamide 
The title compound, C13H16N2O3, adopts an E configuration with respect to the C=N bond and an intra­molecular N—H⋯N hydrogen bond results in the formation of a six-membered ring. In the crystal, inter­molecular O—H⋯O hydrogen bonds link the mol­ecules into a chain propagating along the b axis. Very weak π–π stacking inter­actions [centroid–centroid distance = 4.18 (2) Å] may further consolidate the packing, forming a two-dimensional supra­molecular network.
doi:10.1107/S1600536809022260
PMCID: PMC2969475  PMID: 21582888
2.  3′,6′-Bis(ethyl­amino)-2-[(2-hydroxy­ethyl)­amino]-2′,7′-dimethylspiro­[isoindoline-1,9′-xanthen]-3-one 
In the title compound, C28H32N4O3, the dihedral angle between the planes of the xanthene ring system and the spiro­lactam ring is 85.99 (3)°. Mol­ecules are linked by inter­molecular O—H⋯O and N—H⋯O hydrogen-bonding inter­actions.
doi:10.1107/S1600536808023611
PMCID: PMC2962210  PMID: 21203332
3.  3′,6′-Bis(diethyl­amino)-2-(2-hydroxy­ethyl­amino)spiro­[isoindoline-1,9′-xanthen]-3-one 
In the title mol­ecule, C30H36N4O3, the dihedral angle between the planes of the xanthene and spiro­lactam rings systems is 88.69 (4)°. Both C atoms of one of the ethyl groups are disordered over two sites with occupancies 0.72 (2)/0.28 (2). The conformation of the mol­ecule may be influenced by two intra­molecular hydrogen bonds.
doi:10.1107/S1600536808017108
PMCID: PMC2961713  PMID: 21202886

Results 1-3 (3)