title: Antioxidant flavonoid glycosides from aerial parts of the fern Abacopteris penangiana.
abstract: Five new flavan-4-ol glycosides, abacopterins E-I ( 5- 9), and seven known flavonoid glycosides ( 3 and 10- 15) were isolated from the aerial parts of the fern Abacopteris penangiana. Their structures were elucidated on the basis of extensive spectroscopic analysis, including HSQC, HMBC, (1)H- (1)H COSY, and ROESY, and chemical evidence. The isolated glycosides were evaluated for their antioxidant activity using the TEAC assay, and compounds 3, 5- 8, 10, 11, 14, and 15 showed TEAC values of 1.03-1.91 mM.
authors.affiliation: School of Chinese Medicine, Guangzhou University of Traditional Chinese Medicine, Guangzhou, 510006, People's Republic of China.
authors.forename: Zhongxiang
authors.initials: Z
authors.lastname: Zhao
authors.forename: Jing
authors.initials: J
authors.lastname: Jin
authors.forename: Jinlan
authors.initials: J
authors.lastname: Ruan
authors.forename: Chenchen
authors.initials: C
authors.lastname: Zhu
authors.forename: Chaozhan
authors.initials: C
authors.lastname: Lin
authors.forename: Wei
authors.initials: W
authors.lastname: Fang
authors.forename: Yaling
authors.initials: Y
authors.lastname: Cai
mesh_terms: D000975:Antioxidants / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D029624:Ferns / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D016166:Free Radical Scavengers / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D004365:Drugs, Chinese Herbal; D005419:Flavonoids; D016166:Free Radical Scavengers; D006027:Glycosides