title: Two new quinoline glycoalkaloids from Echinops gmelinii.
abstract: Two new glycosidic quinoline alkaloids, 1-methyl-4-methoxy-8-(beta-D-glucopyranosyloxy)-2(1H)-quinolinone (1) and 4-methoxy-8-(beta-D-glucopyranosyloxy)-2(1H)-quinolinone (2), have been isolated from the 1-butanol extract of the aerial parts of Echinops gmelinii (Compositae). Structural elucidation of the two new glycoalkaloids was based on their 1H, 13C, DEPT, HSQC, COSY, HMBC NMR spectra and high-resolution FAB-MS data. These two compounds are rare examples of quinoline alkaloidal glycosides from natural sources.
authors.affiliation: College of Pharmaceuticals and Biotechnology, Tianjin University, Tianjin 300072, China. yfsuphd@yahoo.com
authors.forename: Yan-Fang
authors.initials: YF
authors.lastname: Su
authors.forename: Yang
authors.initials: Y
authors.lastname: Luo
authors.forename: Cheng-Yun
authors.initials: CY
authors.lastname: Guo
authors.forename: De-An
authors.initials: DA
authors.lastname: Guo
mesh_terms: D000470:Alkaloids / Q000737:chemistry*; D019659:Asteraceae; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D008517:Phytotherapy; D035261:Plant Components, Aerial; D010936:Plant Extracts / Q000737:chemistry*; D011804:Quinolines / Q000737:chemistry*
chemical_list: D000470:Alkaloids; D010936:Plant Extracts; D011804:Quinolines