Noungoue Tchamo Diderot, Brelot Lydia, Antheaume Cyril, Ngouela Silvère, Lobstein Annelise
Acta Crystallogr Sect E Struct Rep Online. 2008 Nov 22;64(Pt 12):o2414-5. doi: 10.1107/S160053680803794X.
The title compound, C(22)H(18)O(7), also known as laurentiquinone B, is a new anthraquinone which was isolated from Vismia laurentii, a Cameroonian medicinal plant. The asymmetric unit contains two independent mol-ecules. Each of them contains four fused rings, three of which are coplanar and typical of anthracene, while the heterocyclic rings adopt envelope conformations. Intra-molecular O-H⋯O hydrogen bonds result in the formation of two planar rings, which are also almost coplanar with the adjacent rings. In the crystal structure, inter-molecular O-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules and a π-π contact is also present [centroid-centroid distance = 3.967 (3) Å].
标题化合物C(22)H(18)O(7)，也被称为劳伦蒂醌B，是一种从喀麦隆药用植物劳伦蒂维斯米中分离出的新型蒽醌。不对称单元包含两个独立分子。每个分子包含四个稠环，其中三个是共面的且具有典型的蒽结构，而异环采取信封式构象。分子内O-H⋯O氢键导致形成两个平面环，这两个平面环也几乎与相邻环共面。在晶体结构中，分子间O-H⋯O和C-H⋯O氢键连接分子，并且还存在一个π-π接触[质心-质心距离 = 3.967 (3) Å]。
