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DOI: 10.1055/s-0029-1185476
© Georg Thieme Verlag KG Stuttgart · New York
Phenolic Compounds in the Leaves of Populus ussuriensis and their Antioxidant Activities
Publication History
received November 12, 2008
revised February 8, 2009
accepted February 11, 2009
Publication Date:
18 March 2009 (online)
Abstract
Two new phenolic glucosides [isograndidentatin A (1) and isograndidentatin B (2)], 5 known phenolic glucosides [grandidentatin (3), salireposide (4), populoside (5), populoside A (6), and salicortin (7)], and 2 known phenolic acids [p-coumaric acid (8) and caffeic acid (9)] were isolated from the leaves of Populus ussuriensis. Structure elucidation of 1 and 2 was achieved through extensive spectroscopic techniques. Compounds 1–6 and 9 showed significant antioxidant activities, which were evaluated by the DPPH radical-scavenging method (IC50 values of 6.68, 6.61, 6.75, 6.84, 6.76, 6.79, and 5.92 µM, respectively) and the ABTS ·+ radical-scavenging system (TEAC values of 1.21, 1.28, 1.26, 1.05, 1.69, 1.60, and 2.00 mM, respectively).
Key words
Populus ussuriensis - Salicaceae - antioxidant activities - phenolic compound - phenolic glucoside
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Prof. Dr. Chuan-Ling Si
Tianjin Key Laboratory of Pulp & Paper
College of Material Science and Chemical Engineering
Tianjin University of Science and Technology
300457 Tianjin
People's Republic of China
Phone: + 86 22 60 60 20 06
Fax: + 86 22 60 60 25 10
Email: sichli@tust.edu.cn