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Two new bibenzyls from Pleione grandiflora (Rolfe) Rolfe and their antioxidant activity
Wei Li1, Jia-Rui Fu2, Li-Jun Zheng3
1College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou, P. R. China.
Abstract:
Two new bibenzyls (1 and 2) were isolated from the pseudobulbs of Pleione grandiflora (Rolfe) Rolfe along with six known compounds, including isoarundinin I (3), isoarundinin II (4), bulbocodin D (5), batatasin III (6), 5,3'-dihydroxy- 4-(p-hydroxybenzyl)-3-methoxybibenzyl (7) and shancigusin F (8). Their structures were established on the basis of spectroscopic methods. These compounds showed potent DPPH free radical scavenging effects with IC50 values ranging from 49.72 ± 0.35 μM to 65.41 ± 0.49 μM.
