title: Bruceolline D: 3,3-dimethyl-1H,4H-cyclo-penta-[b]indol-2(3H)-one.
abstract: The title compound, C13H13NO, crystallizes with four independent mol-ecules in the asymmetric unit. The 12-membered penta-[b]indole rings are essentially planar, with maximum deviations ranging from 0.034 (4) to 0.036 (4) Å in the four unique mol-ecules. In the crystal, weak C-H⋯O inter-actions are observed, which link the mol-ecules into chains along [010].
authors.affiliation: Department of Chemistry, Dartmouth College, Hanover, NH 03755-3564, USA.
authors.forename: Justin M
authors.initials: JM
authors.lastname: Lopchuk
authors.forename: Gordon W
authors.initials: GW
authors.lastname: Gribble
authors.forename: Jerry P
authors.initials: JP
authors.lastname: Jasinski
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