Two new antiallergic cyanoglycosides named rhodiocyanosides A and B were isolated from the Chinese natural medicine "Si Lie Hong Jing Tian" (Shiretsukoukeiten in Japanese), the underground part of Rhodiola quadrifida (Pall.) Fisch. et Mey., together with two new glycosides, octyl α-L-arabinopyranosyl(1-6)-β-D-glucopyranoside and gossypetin 7-O-β-D-glucopyranosyl(1-3)-α-L-rhamnopyranoside. Their chemical structures were determined on the basis of chemical and physicochemical evidence. Rhodiocyanosides A and B exhibited inhibitory activity on the histamine release from rat peritoneal exudate cells sensitized with anti-DNP IgE. In addition, rhodiocyanoside A was found to inhibit the PCA reaction in rats.
从中国天然药物 "四烈红景天"(日文为 Shiretsukoukeiten)(红景天的地下部分)中分离出两种新的抗过敏
氰苷,分别命名为红景天
氰苷 A 和 B、以及两种新苷,辛基 α-L-阿拉伯
吡喃糖基(1-6)-β-
D-吡喃葡萄糖苷和钩藤苷 7-O-β-
D-吡喃葡萄糖基(1-3)-α-
L-鼠李糖苷。根据
化学和物理
化学证据确定了它们的
化学结构。Rhodiocyanoside A 和 B 具有抑制抗 DNP IgE 致敏的大鼠腹腔渗出细胞释放
组胺的活性。此外,还发现 rhodiocyanoside A 可抑制大鼠的 PCA 反应。