5-Benz­yl-6-meth­yl-2-thioxo-2,3-dihydro­pyrimidin-4(1H)-one

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.

Dieth­yl 4,8-dioxo-2,6-diphen­yl-1,3,5,7-tetra­hydro-2,3a,4a,6,7a,8a-hexa­aza­cyclo­penta­[def]fluorene-8b,8c-dicarboxyl­ate

In the title compound, C₂₆H₂₈N₆O₆, the dihedral angle between the two five-membered rings is 73.1 (2); that between the two phenyl rings is 60.1 (1)°.

Dieth­yl cis-1,2,3,4,5,10-hexa­hydro-6-iodo-1,4-dioxo-2,3,4a,10a-tetra­aza­benzo[g]cyclo­pent[cd]azulene-2a,10b-dicarboxyl­ate

The title compound, C₁₈H₁₉IN₄O₆, is a glycoluril derivative which contains four fused rings. An iodo­benzene ring is fused to a seven-membered ring linked to two of the N atoms from the separate rings of the glycoluril system. The structure is stabilized by inter­molecular hydrogen bonds and π–π-stacking inter­actions.

N,N'-Bis(N,N-dimethyl-p-toluidine)bis­(ethoxy­carbon­yl)glycoluril

In the title compound (systematic name: diethyl 4,8-dioxo-2,6-di-p-tolyl-1,3,5,7-tetra­hydro-2,3a,4a,6,7a,8a-hexa­azacyclopenta­[def]fluorene-8b,8c-dicarboxyl­ate), C₂₈H₃₂N₆O₆, the dihedral angles between the two fused five-membered rings in the glycoluril unit and between the two terminal benzene rings are 71.8 (2) and 88.5 (1)°, respectively.