Within the framework of a detailed crystallochemical analysis a comparison of the structures of symmetrically independent molecules was performed and the energy of intermolecular interaction was calculated for a triclinic bisystem crystal, 2,6-dimethyl-3,5-dicarbomethoxy-4-(2¢,3¢-dichlorophenyl)-1,4-dihydropyridine. Pseudosymmetrical operations were detected and identified. The presence of highly efficient layers with pseudomonoclinic symmetry was disclosed in this structure.
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