title: 4,4,5,5-Tetra-methyl-2-[4-(2-pyrid-yl)phen-yl]-3,4-dihydro-imidazole-1-oxyl-3-oxide.
abstract: In the title compound, C(18)H(20)N(3)O(2), the pyridine and phenyl rings are coplanar [dihedral angle = 3.5 (3)°]. The phenyl ring makes a dihedral angle of 29.6 (1)° with the imidazole ring. The crystal structure is stabilized by inter-molecular C-H⋯O hydrogen bonds.
authors.affiliation: Department of Chemistry, School of Pharmacy, Fourth Military Medical University, Changle West Road 17, 710032 Xi-An, People's Republic of China.
authors.forename: Xiang-Yang
authors.initials: XY
authors.lastname: Qin
authors.forename: Ping-An
authors.initials: PA
authors.lastname: Wang
authors.forename: Xiao-Li
authors.initials: XL
authors.lastname: Sun