Two new quinoline glycoalkaloids from Echinops gmelinii
Title:
Two new quinoline glycoalkaloids from Echinops gmelinii
Author:
Su, Yan-Fang Luo, Yang Guo, Cheng-Yun Guo, De-An
Appeared in:
Journal of Asian natural products research
Paging:
Volume 6 (2004) nr. 3 pages 223-227
Year:
2004-09
Contents:
Two new glycosidic quinoline alkaloids, 1-methyl-4-methoxy-8-(β-d-glucopyranosyloxy)-2(1H)-quinolinone (1) and 4-methoxy-8-(β-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.