title: Five new stilbene dimers from the lianas of Gnetum hainanense.
abstract: Five new stilbene dimers, gnetuhainins A-E (1-5), were isolated together with resveratrol trans-dehydrodimer (6), resveratrol, oxyresveratrol, and (-)-epsilon-viniferin from the lianas of Gnetum hainanense. Their structures and stereochemistry were determined on the basis of their chemical and spectral data. Compounds 1-5 are dimers formed by a resveratrol unit and an oxyresveratrol unit and belong to a new type of oligostilbenes polymerized from two different stilbene units.
authors.affiliation: Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Xiannongtan Street, Beijing 100050, People's Republic of China.
authors.forename: K S
authors.initials: KS
authors.lastname: Huang
authors.forename: Y H
authors.initials: YH
authors.lastname: Wang
authors.forename: R L
authors.initials: RL
authors.lastname: Li
authors.forename: M
authors.initials: M
authors.lastname: Lin
mesh_terms: D019281:Dimerization; D015394:Molecular Structure; D010944:Plants / Q000737:chemistry*; D013057:Spectrum Analysis; D013267:Stilbenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D013267:Stilbenes