Isolation of Camelliaside C from "Tea Seed Cake" and Inhibitory Effects of Its Derivatives on Arachidonate 5-Lipoxygenase.
摘要:
从由茶树(Camellia sinensis O. Kuntze)去脂种子制备的“茶籽饼”中分离得到一个新的黄酮醇苷,命名为油茶叶苷C(camelliaside C)。通过光谱学方法(FAB-MS、UV、IR、1H-和13C-NMR)确定其结构为山萘酚3-O-β-D-半乳糖吡喃糖基-(1→2)-β-D-葡萄糖吡喃糖苷,并且证实了油茶叶苷C能够经酶促转化生成紫云英苷。油茶叶苷C对RBL-1细胞中的花生四烯酸5-脂氧合酶显示出抑制作用(IC50:1.4×10-4 M),与其从同一产物中分离得到的油茶叶苷A和B的效果相似。
DOI:
10.1248/cpb.41.1185
作为产物:
描述:
camelliaside A 反应 4.0h,
以68.2%的产率得到3-[(2S,3R,4S,5S,6R)-4,5-二羟基-6-(羟基甲基)-3-[(2S,3R,4S,5R,6R)-3,4,5-三羟基-6-(羟基甲基)四氢吡喃-2-基]氧基四氢吡喃-2-基]氧基-5,7-二羟基-2-(4-羟基苯基)苯并吡喃-4-酮
参考文献:
名称:
油茶种子中的两种黄酮醇苷
摘要:
两种新型黄酮醇三糖苷,山茶苷 A 和 B,已从山茶花的种子中分离出来。结构被确定为山奈酚 3-O-[2-O-β-D-吡喃半乳糖基-6-O-α-L-吡喃鼠李糖基]-β-D-吡喃葡萄糖苷和山奈酚 3-O-[2-O-β - D-xylopyranosyl-6-O-α-L-rhamnopyranosyl]-β-D-吡喃葡萄糖苷基于光谱、化学和酶学研究。这些类型的糖苷间键,Gal(1----2)[Rha(1----6)]Glc 和 Xyl(1----2)[Rha(1----6)]Glc,以前在黄酮和黄酮醇苷中没有报道过。
A new flavonol glycoside, camelliaside C, was isolated from "tea seed cake" prepared from the defatted seeds of Camellia sinensis O. KUNTZE. The structure was determined as kaempferol 3-O-β-D-galactopyranosyl-(1→2)-β-D-glucopyranoside by spectroscopic methods (FAB-MS, UV, IR, 1H- and 13C-NMR) and the enzymatic transformation of camelliaside C to astragalin. Camelliaside C showed an inhibitory effect on the arachidonate 5-lipoxygenase of RBL-1 cells (IC50 : 1.4×10-4 M) as did camelliaside A and B isolated from the same product.
从由茶树(Camellia sinensis O. Kuntze)去脂种子制备的“茶籽饼”中分离得到一个新的黄酮醇苷,命名为油茶叶苷C(camelliaside C)。通过光谱学方法(FAB-MS、UV、IR、1H-和13C-NMR)确定其结构为山萘酚3-O-β-D-半乳糖吡喃糖基-(1→2)-β-D-葡萄糖吡喃糖苷,并且证实了油茶叶苷C能够经酶促转化生成紫云英苷。油茶叶苷C对RBL-1细胞中的花生四烯酸5-脂氧合酶显示出抑制作用(IC50:1.4×10-4 M),与其从同一产物中分离得到的油茶叶苷A和B的效果相似。
Two flavonol glycosides from seeds of Camellia sinensis
Two novel flavonol triglycosides, camelliaside A and B, have been isolated fromseeds of Camelliasinensis. The structures were determined to be kaempferol 3-O-[2-O-beta-D- galactopyranosyl-6-O-alpha-L-rhamnopyranosyl]-beta-D-glucopyranoside and kaempferol 3-O-[2-O-beta- D-xylopyranosyl-6-O-alpha-L-rhamnopyranosyl]-beta-D-glucopyranoside on the basis of spectroscopic, chemical and enzymatic studies
两种新型黄酮醇三糖苷,山茶苷 A 和 B,已从山茶花的种子中分离出来。结构被确定为山奈酚 3-O-[2-O-β-D-吡喃半乳糖基-6-O-α-L-吡喃鼠李糖基]-β-D-吡喃葡萄糖苷和山奈酚 3-O-[2-O-β - D-xylopyranosyl-6-O-α-L-rhamnopyranosyl]-β-D-吡喃葡萄糖苷基于光谱、化学和酶学研究。这些类型的糖苷间键,Gal(1----2)[Rha(1----6)]Glc 和 Xyl(1----2)[Rha(1----6)]Glc,以前在黄酮和黄酮醇苷中没有报道过。