In the title compound, C22H21N3O4, the central pyrrolidine ring adopts an envelope conformation with the N atom in the flap position. The indoline ring systems are almost perpendic­ular to the mean plane of the pyrrolidine ring, making dihedral angles of 86.4 (8) and 83.1 (8)°. The acetate group attached to the pyrrolidine ring assumes an extended conformation. In thecrystal, N—H⋯O hydrogen bonds result in the formation of a C(7) chain running along [100]. The crystal packing also features π–π inter­actions [centroid–centroid distance = 3.2032 (11) Å].

No abstract

The title compound, CH7N4 +·C4H3O4 −, is a molecular salt in which the amino­guanidinium cations and fumarate monoanions are close to planar, with maximum deviations of 0.011 (1) and 0.177 (1) Å, respectively. The crystal packing is stabilized by inter­molecular N—H⋯O and O—H⋯O hydrogen bonds.

Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.002 Å; R factor = 0.041; wR factor = 0.106; data-to-parameter ratio = 16.0.In the title compound, C 28 H 30 N 2 O 2 , the cyclohexene ring system adopts a sofa conformation. The crystal structure is stabilized by C-HÁ Á ÁO interactions between methyl H atoms of the ethyl substituents and the O atoms of carbonyl groups of adjacent molecules, and by an intermolecular carbonylcarbonyl interactions . ExperimentalCrystal data Data collectionBruker APEXII CCD area-detector diffractometer Absorption correction: none 11070 measured reflections 2334 independent reflections 1898 reflections with I > 2(I) R int = 0.029

In the title compound, C6H12O5, the cyclo­hexane ring adopts a chair conformation. The absolute configuration is not defined. However, the relative configuration can be assigned as 1R*,3R*,4S*,S*. In the crystal structure, mol­ecules are linked by strong inter­molecular O—H⋯O hydrogen bonds, producing a three-dimensional network.