title: 3-Isobutyl 5-methyl 2,6-dimethyl-4-(2-nitro-phen-yl)pyridine-3,5-dicarboxyl-ate.
abstract: The title nitro-phenyl pyridine compound, C(20)H(22)N(2)O(6) was synthesized as a degradation product of the hypertension medication nisoldipine. The dihedral angle between the nitro-substituted phenyl ring and the pyridine ring is 75.5 (4)°. There are a number of C-H⋯O inter-actions between symmetry-related mol-ecules>.
authors.forename: Hui
authors.initials: H
authors.lastname: Chen
authors.forename: Jing
authors.initials: J
authors.lastname: Luo
authors.forename: Lin-Lin
authors.initials: LL
authors.lastname: Jing
authors.forename: Ru
authors.initials: R
authors.lastname: Jiang