Two new acetylated kaempferol glycosides were isolated from the seeds of Camellia semiserrata Chi, their structures were elucidated as kaempferol-3-O-[(3-O-acetyl)-a-L-rhamnopyranosyl(1 →3)(4-O-acetyl)-α-L-rha...Two new acetylated kaempferol glycosides were isolated from the seeds of Camellia semiserrata Chi, their structures were elucidated as kaempferol-3-O-[(3-O-acetyl)-a-L-rhamnopyranosyl(1 →3)(4-O-acetyl)-α-L-rhamnopyranosyl(1→ 6)-β-D-glucopyranoside] (1) and kaempferol-3-O-[(2-O-acetyl)-α-L-rhamnopyranosyl (1 →3)(4-O-acetyl)-α-L-rhamnopyranosyl(1 →6)-β-D- gluco-pyranoside] (2) by spectral experiments (including ESI-MS, 1D- and 2D-NMR)..展开更多
以南山茶籽为原料,利用溶剂提取法、液液分离、硅胶层析、高效液相半制备色谱等手段提取分离得到了一个高纯度的化合物,通过理化性质、质谱和核磁鉴定该化合物为乙酰基黄酮苷类化合物山奈酚-3-O-[α-L-鼠李糖基-(1-3)-2,4-di-O-乙酰基-...以南山茶籽为原料,利用溶剂提取法、液液分离、硅胶层析、高效液相半制备色谱等手段提取分离得到了一个高纯度的化合物,通过理化性质、质谱和核磁鉴定该化合物为乙酰基黄酮苷类化合物山奈酚-3-O-[α-L-鼠李糖基-(1-3)-2,4-di-O-乙酰基-α-L-鼠李糖基-(1-6)]-β-D-葡萄糖苷。运用H-H COSY、HSQC、HMBC和TOCSY等二维核磁共振(2D-NMR)技术对其~1 H和^(13) C NMR数据进行了全归属和详细解析。展开更多
基金financially supported by the National Natural Science Foundation of China(No.30772714)
文摘Two new acetylated kaempferol glycosides were isolated from the seeds of Camellia semiserrata Chi, their structures were elucidated as kaempferol-3-O-[(3-O-acetyl)-a-L-rhamnopyranosyl(1 →3)(4-O-acetyl)-α-L-rhamnopyranosyl(1→ 6)-β-D-glucopyranoside] (1) and kaempferol-3-O-[(2-O-acetyl)-α-L-rhamnopyranosyl (1 →3)(4-O-acetyl)-α-L-rhamnopyranosyl(1 →6)-β-D- gluco-pyranoside] (2) by spectral experiments (including ESI-MS, 1D- and 2D-NMR)..
文摘以南山茶籽为原料,利用溶剂提取法、液液分离、硅胶层析、高效液相半制备色谱等手段提取分离得到了一个高纯度的化合物,通过理化性质、质谱和核磁鉴定该化合物为乙酰基黄酮苷类化合物山奈酚-3-O-[α-L-鼠李糖基-(1-3)-2,4-di-O-乙酰基-α-L-鼠李糖基-(1-6)]-β-D-葡萄糖苷。运用H-H COSY、HSQC、HMBC和TOCSY等二维核磁共振(2D-NMR)技术对其~1 H和^(13) C NMR数据进行了全归属和详细解析。