title: 2-(1H-Indol-3-yl)-4,4,5,5-tetra-methyl-imidazolidine-1-oxyl 3-oxide.
abstract: In the title compound, C(15)H(18)N(3)O(2), the plane of the indole ring system is twisted with respect to the plane of the nitronyl nitroxide moiety, exhibiting a dihedral angle of 21.61 (6)°. The crystal packing is stabilized by N-H⋯O hydrogen bonds and weak C-H⋯O inter-actions.
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: Hai-Bo
authors.initials: HB
authors.lastname: Wang
authors.forename: Lin-Lin
authors.initials: LL
authors.lastname: Jing
authors.forename: Ru
authors.initials: R
authors.lastname: Jiang
authors.forename: Peng
authors.initials: P
authors.lastname: Liu
authors.forename: Xiao-Li
authors.initials: XL
authors.lastname: Sun