Zhao Lei, Wu Dinghui, Yu Xiaohui, Zhang Yan
Department of Pharmacy, Gansu College of Traditional Chinese Medicine, Lanzhou 730000, China.
Zhongguo Zhong Yao Za Zhi. 2010 Mar;35(6):722-4. doi: 10.4268/cjcmm20100614.
To study the chemical constituents of the whole plant of Rhododendron concinnum.
The compounds were isolated and purified by chromatography on silica gel and polyamide. Their structures were identified on the basis of spectroscopic data (MS,1H-NMR and 13C-NMR) and chemical evidence.
Five dihydroflavones were isolated and identified as (2R)-farrerol-7-O-glucopyranoside (1), (2R,3R)-(-)-dihydroquercetin-3-O-beta-D-xylopyranoside(2), (2S,3S)-(-)-dihydroquercetin-3-O-beta-D-glucopyranoside(3), eriodictyol-7-O-beta-D-glucopyranoside (4) , (2R, 3R)-(+)-dihydroquercetin (5).
Except compound 5, others were firstly isolated from the genus Rhododendron.
研究优美杜鹃全株的化学成分。
通过硅胶柱色谱和聚酰胺柱色谱分离纯化化合物。根据光谱数据（质谱、氢核磁共振谱和碳核磁共振谱）和化学证据鉴定其结构。
分离鉴定出5个二氢黄酮，分别为(2R)-杜鹃素-7-O-吡喃葡萄糖苷(1)、(2R,3R)-(-)-二氢槲皮素-3-O-β-D-吡喃木糖苷(2)、(2S,3S)-(-)-二氢槲皮素-3-O-β-D-吡喃葡萄糖苷(3)、圣草酚-7-O-β-D-吡喃葡萄糖苷(4)、(2R,3R)-(+)-二氢槲皮素(5)。
除化合物5外，其他化合物均首次从杜鹃属植物中分离得到。
