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In the structure of the title compound, C27H39N3O3, each of the (4-oxopiperidin-1-yl)methyl residues adopts a flattened chair conformation (with the N and carbonyl groups being oriented to either side of the central C4 plane) and they occupy positions approximately orthogonal to the central benzene ring [Cbenzene—C—Cmethyl­ene—N torsion angles 103.4 (2), −104.4 (3) and 71.9 (3)°]; further, two of these residues are oriented to one side of the central benzene ring with the third to the other side. In the crystal packing, supra­molecular layers in the ab plane are sustained by C—H...O inter­actions.

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The bicyclo­[3.3.1]nonane ring in the title compound, C39H44N2O, adopts a chair–boat conformation with the four benzene rings being directed away from the carbonyl group. The presence of C—H...O contacts leads to helical supra­molecular chains along the b axis.

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The asymmetric unit of the title compound, C13H10F2N2O, contains one and a half N,N′-bis­(4-fluoro­phen­yl)urea mol­ecules. One of the mol­ecules has crystallographic twofold rotation symmetry. The benzene rings are twisted from each other by dihedral angles of 29.69 (6)° for the mol­ecule in a general position and 89.83 (6)° for the symmetry-generated mol­ecule. In the crystal structure, a pair of inter­molecular N—H...O hydrogen bonds link symmetry-related mol­ecules into chains along the b axis, forming R21(6) ring motifs.

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In the title compound, C27H20ClNO, the quinoline ring forms a dihedral angle of 62.53 (5)° with the substituent benzene ring. In the crystal, inter­molecular C—H...Cl inter­actions link the mol­ecules into chains along the b axis. Inter­molecular C—H...N and C—H...O hydrogen bonds further consolidate the structure into a three-dimensional network. The unit cell contains four solvent-accessible voids, each with a volume of 35 Å3, but no significant electron density was found in them.

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In the title compound, C19H23NO6, the 1,4-dihydro­pyridine ring is twisted slightly from planarity, with a maximum deviation of 0.101 (1) Å, and adopts a very flattened boat conformation. The dihedral angle formed between the plane through the four C atoms of the 1,4-dihydro­pyridine ring and the benzene ring is 84.67 (7)°. In the crystal structure, inter­molecular N—H...O and C—H...O hydrogen bonds link the mol­ecules into a three-dimensional network.

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In the title compound, C6H10N2O, the 2,3-dihydro-1H-pyrazole ring is approximately planar, with a maximum deviation of 0.013 (1) Å. Pairs of inter­molecular N—H...O hydrogen bonds link neighboring mol­ecules into dimers, generating R22(8) ring motifs. These dimers are further linked into two-dimensional arrays parallel to the bc plane by inter­molecular N—H...O hydrogen bonds. The crystal structure is further stabilized by C—H...π inter­actions.

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In the title compound, C14H18N2O3S, the 1H-pyrazole ring is approximately planar, with a maximum deviation of 0.005 (1) Å. The dihedral angle formed between the 1H-pyrazole and phenyl rings is 79.09 (5)°. Pairs of inter­molecular N—H...O and O...H...N hydrogen bonds form dimers between neighboring mol­ecules, generating R22(10) ring motifs. These dimers are further linked by intermolecular N—H...O and O—H...N hydrogen bonds into two-dimensional arrays parallel to the ac plane. The crystal structure is also stabilized by C—H...π inter­actions.
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