Acylated hydroxycinnamic acid glucosides from flowers of Telekia Speciosa. (June 2015)

• Record Type: Journal Article
• Authors: Stojakowska, Anna; Malarz, Janusz; Żylewski, Marek; Kisiel, Wanda
• Is Part Of: Phytochemistry letters. Volume 12(2015:Jun.)
• Page Start: 257
• Page End: 261
• Publication Date: 2015-06
• Subjects: Hydroxycinnamates -- Inulae -- Phenolic compounds -- Telekia; Botanical chemistry -- Periodicals; Chimie végétale -- Périodiques; 572.205
• DOI: 10.1016/j.phytol.2015.04.010
• Languages: English
• ISSNs: 1874-3900

Abstract

Graphical abstract: Highlights: Three new acylated glucosides of hydroxycinnamic acids were described. Seven phenolic compounds were isolated from T. speciosa flowers. Five compounds were found for the first time in T. speciosa . Abstract: One new derivative of ferulic acid (1 ), two new caffeic acid derivatives (2 and 3 ) and three known derivatives of caffeic acid: 6- O -( E )-caffeoyl-glucopyranose (4 ), ( E )-caffeic acid 4- O -β-glucopyranoside (5 ) and 5-caffeoylquinic acid (chlorogenic acid, 6 ) were isolated from a butanolic fraction of extract from Telekia speciosa flowers. Moreover, the flavonol glucoside–patulitrin (7 ) was identified in the analyzed extract. Structures of ( E )-ferulic acid 4- O - β -(6- O -2-hydroxyisovaleryl)-glucopyranoside (1 ), ( E )-caffeic acid 4- O-β -(6- O -2-hydroxyisovaleryl)-glucopyranoside (2 ) and ( E )-caffeic acid 4- O - β -(6- O -3-hydroxy-2-methylpropanoyl)-glucopyranoside (3 ) were elucidated by 1D and 2D NMR, HRESIMS and other spectral analyses.