title: Phenolic compounds in the leaves of Populus ussuriensis and their antioxidant activities.
abstract: Two new phenolic glucosides [isograndidentatin A (1) 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 (IC(50) values of 6.68, 6.61, 6.75, 6.84, 6.76, 6.79, and 5.92 microM, 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).
authors.affiliation: Tianjin Key Laboratory of Pulp & Paper, College of Material Science and Chemical Engineering, Tianjin University of Science and Technology, Tianjin, P. R. China. sichli@tust.edu.cn
authors.forename: Chuan-Ling
authors.initials: CL
authors.lastname: Si
authors.forename: Jin-Kyu
authors.initials: JK
authors.lastname: Kim
authors.forename: Young-Soo
authors.initials: YS
authors.lastname: Bae
authors.forename: Shu-Ming
authors.initials: SM
authors.lastname: Li
mesh_terms: D000975:Antioxidants / Q000737:chemistry / Q000302:isolation & purification*; D010636:Phenols / Q000737:chemistry / Q000302:isolation & purification*; D018515:Plant Leaves / Q000737:chemistry*; D032107:Populus / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D010636:Phenols