Two new isoprenylated flavonols, broussoflavonols A and B, and two isoprenylated chalcones, broussochalcones A and B, were isolated from the benzene extract of the cortex of Broussonetia papyrifera (L.) VENT. (Japanese name "Kajinoki, " Moraceae). The structures of broussoflavonols A, B, and broussochalcone B were shown to be 1, 2, and 4, respectively, on the basis of spectral evidence, and the structure of broussochalcone A was determined to be 3 on the basis of spectral and chemical evidence.
从构树 (Broussonetia papyrifera (L.) VENT) 皮层的苯
提取物中分离出两种新的
异戊二烯基化
黄酮醇,构树
黄酮醇 A 和 B,以及两种
异戊二烯基化
查尔酮,构树
查尔酮 A 和 B。 (日文名“Kajinoki”,桑科)。根据光谱证据,构树
黄酮醇 A、B 和构树
查尔酮 B 的结构分别为 1、2 和 4,根据光谱和
化学证据,确定构树
查尔酮 A 的结构为 3 。