title: [2-Arylbenzofuran derivatives from Morus wittiorum].
abstract: The investigation on the stem bark of Morus wittiorum was carried out to find its chemical constituents possessing anti-oxidative activity. The isolation and purification were performed by various chromatographies such as silica gel, Sephadex LH-20, RP-C18 column chromatography and so on. Based on the spectral analysis such as NMR, MS, etc., seven 2-arylbenzofuran derivatives were identified as wittifuran D (1), wittifuran E (2), moracin C (3), moracin M (4), moracin P (5), 2-(3,5-dihydroxyphenyl)-5,6-dihydroxybenzofuran (6) and mulberroside C (7). Compounds 1-7 were isolated from this plant for the first time. Among them, 1 and 2 were new compounds. Compounds 3-7 were used to assay antioxidant activity, the inhibitory ratios of compounds 3, 4, 6, at a concentration of 1 x 10(-5) mol x L(-1), to malondialdehyde (MDA) produced during microsomal lipid peroxidation induced by ferrous-cysteine were 73%, 69% and 89% respectively.
authors.affiliation: Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China.
authors.forename: Yong-Xia
authors.initials: YX
authors.lastname: Tan
authors.forename: Chao
authors.initials: C
authors.lastname: Liu
authors.forename: Ruo-Yun
authors.initials: RY
authors.lastname: Chen
mesh_terms: D000975:Antioxidants / Q000302:isolation & purification / Q000494:pharmacology; D001572:Benzofurans / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D015227:Lipid Peroxidation; D008315:Malondialdehyde / Q000737:chemistry; D015394:Molecular Structure; D031625:Morus / Q000737:chemistry*; D024301:Plant Bark / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry; D013267:Stilbenes / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*
chemical_list: D000975:Antioxidants; D001572:Benzofurans; D013267:Stilbenes; C475758:moracin C; C540980:moracin P; D008315:Malondialdehyde