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The molecule of the title compound, C30H28N6O6, a glycoluril derivative, lies on a twofold rotation axis with two ethyl acetate groups bonded to the convex face of the glycoluril system. The dihedral angle between the imidazolone rings is 73.12 (3)°. Two symmetry-equivalent six-membered triazine rings are fused to the glycouril unit to form rigid side walls of a molecular clip. The crystal structure is stabilized by weak intermolecular C—H⋯O hydrogen bonds. The ethyl ester group is disordered over two sites of occupancy 0.539 (7) and 0.461 (7). [ABSTRACT FROM AUTHOR]

In the title compound, C25H24O9, the substituted benzene rings are twisted away from the furan ring. The dihedral angle between the two benzene rings is 52.1 (1)°. In the crystal structure, the mol­ecules exist as hydrogen-bonded dimers, the mol­ecules being connected through very weak C—H⋯O hydrogen bonds. [ABSTRACT FROM AUTHOR]

In the title compound, C28H32O11·0.16H2O, the substituted benzene rings are twisted slightly away from the furan ring. The dihedral angle between the two benzene rings is 8.8 (1)°. In the crystal structure, the mol­ecules exist as C—H⋯O hydrogen-bonded dimers. [ABSTRACT FROM AUTHOR]

The title compound, C17H12N4O4·2CH4O, crystallizes with the main mol­ecule lying on a twofold axis (through the methyl­ene bridge C atom) and two methanol solvent mol­ecules in general positions. Inter­molecular O—H⋯O and C—H⋯O inter­actions are present, with the methanol mol­ecules acting as O—H hydrogen-bond donors and acceptors. [ABSTRACT FROM AUTHOR]

In the title compound, C12H12N2OS, the dihedral angle between the benzene and pyrimidine rings is 84.1 (1)°. The mol­ecules are linked by centrosymmetric pairs of N—H⋯O [N⋯O = 2.817 (2) Å] and N—H⋯S [N⋯S = 3.357 (2) Å] hydrogen bonds to form chains. [ABSTRACT FROM AUTHOR]

The title compound, C25H20N6O3·CHCl3, a rigid glycoluril derivative, is an intermediate for the synthesis of molecular tweezers. The crystal structure is stabilized by intermolecular C—H...O and N—H...O hydrogen bonds. The chloroform solvent molecule is disordered over two positions; the site occupancy factors are ca 0.89 and 0.11. [ABSTRACT FROM AUTHOR]

The crystal structure of the title compound, C28H22N6O5·CHCl3, an important inter­mediate for mol­ecular tweezers, shows inter­molecular hydrogen bonding. [ABSTRACT FROM AUTHOR]

In the crystal structure of the title compound, C22H22O6, the asymmetric unit consists of one half-mol­ecule with the other half generated by a centre of inversion. The crystal packing is stabilized by C—H⋯O inter­molecular inter­actions. [ABSTRACT FROM AUTHOR]

The title compound, C24H18Br2N4O2·H2O, forms a supra­molecular structure via N—H⋯O, O—H⋯O and C—H⋯O hydrogen bonds. In the crystal structure, the water molecule serves as a bifurcated hydrogen-bond acceptor and as a hydrogen-bond donor. [ABSTRACT FROM AUTHOR]

In the centrosymmetric title compound, C24H22O10, the two aromatic rings are parallel to each other. The crystal packing is stabilized mainly by van der Waals forces. [ABSTRACT FROM AUTHOR]

The title compound, C26H30O10, is the meso isomer of a 2,3-disubstituted succinic acid derivative and has inversion symmetry. The crystal structure is stabilized by inter­molecular C—H⋯π and π–π stacking inter­actions. [ABSTRACT FROM AUTHOR]