Chemical constituents in Populus davidiana / 中草药

Objective To investigate the chemical constituents in the barks of Populus davidiana. Methods The constituents were isolated by column chromatography and their structures were determined on the basis of chemical and spectral data. Results Sixteen compounds were isolated and twelve of them were identified as 3?-acetoxyurs-12-en-28-oicacid (Ⅰ), ?-sitosterol (Ⅱ), 4-methoxyphenol (Ⅲ), 3-methoxyphenol (Ⅳ), sakuranetin (Ⅴ), scopoletin (Ⅵ), 2R, 3R-dihydro-7-methoxy-kaempferol (Ⅶ), salicyloyltremuloidin (Ⅷ), tremuloidin (Ⅸ), ?-sitosterol-3-O-glucoside (Ⅹ), salireposide (Ⅺ), and sakuranin ( ⅩⅡ ). Conclusion Compounds Ⅰ, Ⅴ, Ⅵ, and ⅩⅡ are isolated from the plants of Populus L. for the first time.