Kumazawa Shigenori, Goto Hitomi, Hamasaka Tomoko, Fukumoto Syuichi, Fujimoto Takunori, Nakayama Tsutomu
Laboratory of Functional Food Science and COE Program in the 21st Century, School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, Japan.
Biosci Biotechnol Biochem. 2004 Jan;68(1):260-2. doi: 10.1271/bbb.68.260.
The new prenylflavonoid, isonymphaeol-B (1), together with three known compounds, nymphaeol-A (2), nymphaeol-B (3), and nymphaeol-C (4), were isolated from propolis collected in Okinawa, the southern-most prefecture of Japan. The structure of each compound was determined by spectral methods, including mass spectrometry and 2D NMR. Each compound had 1,1-diphenyl-2-picryl-hydrazyl radical-scavenging activity.
新的异戊烯基黄酮类化合物异睡莲黄酮 - B（1），与三种已知化合物睡莲黄酮 - A（2）、睡莲黄酮 - B（3）和睡莲黄酮 - C（4）一起，从日本最南端的冲绳县采集的蜂胶中分离得到。通过包括质谱和二维核磁共振在内的光谱方法确定了每种化合物的结构。每种化合物都具有1,1 - 二苯基 - 2 - 苦基肼自由基清除活性。
