Racemic isopropyl 1,4-dihydro-2,6-dimethyl-4-(6-methyl-2-pyridyl)-3-nitropyridine-5-carboxylate hemibenzene solvate

This analysis establishes the rotameric orientation of the pyridyl-ring N atom of the title compound, C17H21N3O4. 0.5C(6)H(6), as antiperiplanar (ap) to the 1,4-dihydropyridine H-4, the absence of an intramolecular hydrogen bond between the 1,4-dihydropyridine NH and the pyridyl-N atom, and the unusual planarity of the 1,4-dihydropyridine ring.