Phenolic compounds from Usnea baileyi (Stirt.) Zahlbr growing in Lam Dong province

Van Kieu Nguyen¹, Thuc Huy Duong^2*

¹Natural Products Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Thailand

²Department of Chemistry, Ho Chi Minh city University of Education, Vietnam

Received 10 October 2018; accepted  30 January 2019

 

Abstract:

This study entails a continuation of the phytochemical study regarding the lichen Usnea baileyi collected in Lam Dong province. Eight compounds, 8'-O-methylprotocetraric acid (1), protocetraric acid (2), virensic acid (3), subvirensic acid (4), barbatic acid (5), diffractaic acid (6), 4-O-demethylbabartic acid (7), and atranorin (8), were isolated using various chromatographic methods. Their chemical structures were elucidated through spectroscopic analysis as well as through a comparison of their data with that in the literature.

Keywords: depside, depsidone, lichen, phenolic compound, Usnea baileyi.

Classification number: 2.2