Novel hydrolyzable tannins from Nuphar Japonicum DC.
作者:Makoto Nishizawa、Takashi Yamagishi、Genichiro Nonaka、Itsuo Nishioka、Hideo Bando
DOI:10.1248/cpb.30.1094
日期:——
Two gallotannins (I and II) and an ellagitannin (III) named nupharin A have been isolated from Nuphar japonicum DC. (Nymphaeaceae). On the basis of chemical and spectral evidence, the structures of I, II and III were characterized as 1, 2, 6-tri-O-galloyl-α-D-glucose, 1, 2, 3, 4, 6-penta-O-galloyl-α-D-glucose and 1, 2, 6-tri-O-galloyl-3, 4-(S)-hexahydroxydiphenoyl-α-D-glucose, respectively.
从日本睡莲(Nuphar japonicum DC.,属于睡莲科)中分离出了两种没食子的鞣酸(I和II)和一种被称为nupharin A的榄仁鞣酸(III)。根据化学和光谱证据,I、II和III的结构分别被鉴定为1, 2, 6-三-O-没食子酸基-α-D-葡萄糖、1, 2, 3, 4, 6-五-O-没食子酸基-α-D-葡萄糖和1, 2, 6-三-O-没食子酸基-3, 4-(S)-六羟基二苯甲酮-α-D-葡萄糖。