title: Anthraquinones and stilbenes from the roots and rhizomes of Rhubarb.
abstract: Two new anthraquinone glucosides [aloe-emodin 8-O-β-d-(6'-galloyl)glucopyranoside (1) and rhein 8-O-β-d-(6'-galloyl)glucopyranoside (2)], together with 16 known compounds (3-18), were isolated from the roots and rhizomes of Rheum hotaoense C.Y. Cheng et C.T. Kao. Their structures were elucidated on the basis of extensive investigation of 1D and 2D NMR, HR-ESI-MS, and chemical evidence. In addition, the free-radical-scavenging activity was tested using the 1,1-diphenyl-2-picrylhydrazyl assay.
authors: Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China.
authors: Wen-Hao
authors: WH
authors: Chen
authors: Juan
authors: J
authors: Chen
authors: Yan-Ping
authors: YP
authors: Shi
mesh_terms: D000880:Anthraquinones / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D001713:Biphenyl Compounds / Q000494:pharmacology; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D016166:Free Radical Scavengers / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D010851:Picrates / Q000494:pharmacology; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D012250:Rheum / Q000737:chemistry*; D027343:Rhizome / Q000737:chemistry; D013267:Stilbenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology
chemical_list: D000880:Anthraquinones; D001713:Biphenyl Compounds; D004365:Drugs, Chinese Herbal; D016166:Free Radical Scavengers; D005960:Glucosides; D010851:Picrates; D013267:Stilbenes; C569319:aloe-emodin 8-O-beta-D-(6'-galloyl)glucopyranoside; C569320:rhein 8-O-beta-D-(6'-galloyl)glucopyranoside; C004931:1,1-diphenyl-2-picrylhydrazyl; C020491:rhein