In the title compound, C(22)H(29)Cl(3)O(13), the glucopyran ring exists in the chair conformation while the glucofuran ring adopts an envelope conformation. Intra-molecular C-H⋯O hydrogen bonds occur. In the crystal, adjacent mol-ecules are linked by weak inter-molecular C-H⋯O hydrogen bonds.

The title compound, C(26)H(39)NO(7), which was isolated from Delphinium anthriscifolium var. majus, has a lycoctonine carbon skeleton containing four six-membered rings (A, B, D and E) and three five-membered rings (C, F and G). Rings A, B and E adopt chair conformation, while ring D adopts a boat conformation. Rings C and F adopt envelope conformations.

The structure of the title compound, C(23)H(21)OPSe(2), consists of fused puckered five- and six-membered rings, PSeC(2)O and C(5)O, respectively, with a C(2)O bridgehead. The C(5)O ring adopts a chair conformation, whilst the C(2)PSeO ring has an envelope conformation.

The title compound, C(25)H(35)N(5)OS, is a functionalized triazoline-3-thione with substituted piperazine and adamantyl substituents attached at the 2- and 5-positions, respectively, of a triazole spacer with an approximately C-shaped conformation of the mol-ecule. The piperazine ring adopts a chair conformation.

The title compound, C(12)H(16)ClNO(2)S, adopts an L-shaped conformation, with the central C-S-N-C torsion angle being -78.0 (2)°. The cyclo-hexyl ring adopts a chair conformation. In the crystal, adjacent mol-ecules are connected by pairs of N-H⋯O hydrogen bonds around an inversion centre, forming cyclic dimers [graph set R(2) (2)(8)].

In the mol-ecule of the title compound, C(19)H(17)ClN(2)O, the heterocyclic six-membered ring adopts a half-chair conformation, while the pyrrolidine ring has an envelope conformation. In the crystal structure, C-Cl⋯π [Cl⋯centroid = 3.680 (2) Å] inter-actions and van der Waals forces are present.

In the title compound, C(28)H(29)FN(2)O(3), the conformation about the ethene bond is E. The piperazine ring adopts a chair conformation. In the crystal, mol-ecules are linked by inter-molecular C-H⋯O hydrogen bonds.

The title compound, C(24)H(34)O(4), is a precursor of Megestrol acetate. Ring A has a half-chair conformation [Q = 0.446 (3) Å, θ = 54.6 (4)° and ϕ = 9.5 (4)°]. Ring D adopts a 13β-envelope conformation [Q = 0.463 (2) Å and ϕ = 188.2 (3)°].

The title compound, C16H23N3O3, contains two morpholine rings, each of which adopts a chair conformation. The mol-ecular conformation is stabilized by an intra-molecular O-H⋯N hydrogen bond, leading to a S(6) ring. In the crystal, mol-ecules are linked into zigzag chains along the c-axis direction by C-H⋯O and C-H⋯π inter-actions.

In the title compound, C15H22O2, both five-membered rings display an envelope conformation whereas the six-membered ring displays a chair conformation. In the crystal, pairs of O-H⋯O hydrogen bonds between carb-oxy-lic groups link mol-ecules, related by a twofold rotation axis, into supra-molecular dimers.