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The synthesis of the title compound, C38H29N3O5, proceeds through a [4 + 2]-cyclo­addition reaction. 4-(4-Methoxy­benzoyl)-5-(4-methoxy­phenyl)­furan-2,3-dione was reacted with phenyl isocyanate to synthesize this new derivative of pyrrolo­[2,3-d]­pyrimidine in a low-temperature reaction. The mol­ecule is composed of a pyrrolo­pyrimidine moiety with three phenyl and two p-methoxy­phenyl substituents.

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The title compound, [Mg(C12H10O4P)(C3H7NO)4](CF3O3S), consists of diphen­ylphosphate anions linked into infinite chains by bridging magnesium ions, which are also coordinated by dimethyl­formamide mol­ecules. A non-coordinated trifluoro­methane­sulfonate counter-ion provides charge balance. Both crystallographically distinct magnesium cations occupy special positions with \overline{1} site symmetry.

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In the title compound, C25H19NO6, the mol­ecular structure is stabilized by intra- and inter­molecular C—H...O hydrogen bonds. The inter­molecular hydrogen bonds link the mol­ecules into a herringbone-like dimer.

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