Major components of Rhododendron luteum leaves

Abstract

β-D-Fructopyranose (1), D-Xylopyranose (2), D-Mannitol (3), and flavonoids including quercetin-3-α-L-arabinofuranoside (4) and quercetin-3-O-glucopyranoside (5) were isolated from the leaves of Rhododendron luteum for the first time. Isolated compounds were identified using 1 D- (¹H-NMR, ¹³C-NMR) and 2 D- NMR (HMBC, HSQC, COSY) spectroscopic techniques and comparison of the literature data. In our study, a relatively high amount of Quercetin-3-O-glucopyranoside was isolated (4%). As a result, our research showed that leaves of Rhododendron luteum could be a good source of monosaccharides, sugar alcohols and bioactive flavonoid glycosides.

Graphical Abstract

Keywords:

• Yellow azalea
• Rhododendron luteum
• isolation
• major components

Acknowledgements

We would like to extend our thanks to Ege University, Faculty of Science, and Chemistry Dept. for laboratory facilities, and Prof. Serdar Gökhan Şenol for the identification of the plant.

Disclosure statement

The authors declare no conflict of interest.