title: Iridoids from Gentiana loureirii.
abstract: Iridoid glycosides, 2',3',6'-tri-O-acetyl-4'-O-trans-p-(O-beta-d-glucopyranosyl)coumaroyl-7-ketologanin (1), 2'-O-caffeoylloganic acid (2), 2'-O-p-hydroxybenzoylloganic acid (3), 2'-O-trans-p-coumaroylloganic acid (4), and 2'-O-cis-p-coumaroylloganic acid (5), were isolated from whole plants of Gentiana loureirii along with six known iridoids, 7-ketologanin (6), loganin (7), loganic acid (8), sweroside, boonein, and isoboonein, and three other known compounds. Their structures were elucidated by spectroscopic means and chemical correlations. The isolated iridoids were evaluated for antibacterial and antioxidant activities, but were either inactive or very weakly active.
authors.affiliation: Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Tianhe District, Guangzhou 510650, China.
authors.forename: Min
authors.initials: M
authors.lastname: Wu
authors.forename: Ping
authors.initials: P
authors.lastname: Wu
authors.forename: Meifang
authors.initials: M
authors.lastname: Liu
authors.forename: Haihui
authors.initials: H
authors.lastname: Xie
authors.forename: Yueming
authors.initials: Y
authors.lastname: Jiang
authors.forename: Xiaoyi
authors.initials: X
authors.lastname: Wei
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology; D000975:Antioxidants / Q000494:pharmacology; D030012:Gentiana / Q000737:chemistry*; D039823:Iridoids / Q000032:analysis* / Q000737:chemistry / Q000494:pharmacology; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D000900:Anti-Bacterial Agents; D000975:Antioxidants; D039823:Iridoids