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organic compounds
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There are two independent molecules in the asymmetric unit of the title compound, C30H44O5. They comprise a triterpenoid skeleton of five six-membered rings and a five-membered lactone ring. The five six-membered rings are all trans-fused. In both independent molecules the D rings adopt a slightly distorted half-chair conformation due the presence of the lactone ring while the other four six-membered rings all adopt chair conformations. The characteristic carbon–carbon double bond of the oleanoic skeleton is absent. Intermolecular O—H
O hydrogen bonds between the hydroxy and carbonyl groups occur in the crystal structure.
O hydrogen bonds between the hydroxy and carbonyl groups occur in the crystal structure.organic compoundsOpen access
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The unit cell of the title compound, C36H36N2, contains two independent molecules which are located about inversion centers. In each molecule the quinoline rings are almost planar, with mean deviations of 0.0302 (1) and 0.0173 (1) Å. In the crystal, molecules are linked by C—Hπ interactions into a three-dimensional network.
π interactions into a three-dimensional network.organic compoundsOpen access
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In the structure of the title compound, C22H21N3O3S, the thiazole ring forms dihedral angles of 88.83 (7) and 9.39 (9)°, respectively, with the benzene and pyrrole rings. The dihydropyrimidine ring adopts a flattened boat conformation. The olefinic double bond is in a Z conformation.
