五味子酯甲
五味子酯甲 性质
熔点 | 110~112℃ |
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沸点 | 675.6±55.0 °C(Predicted) |
密度 | 1.33±0.1 g/cm3(Predicted) |
储存条件 | Inert atmosphere,Store in freezer, under -20°C |
溶解度 | 可溶于氯仿(轻微)、甲醇(轻微、超声处理) |
形态 | 固体 |
酸度系数(pKa) | 13.70±0.60(Predicted) |
颜色 | 白色至类白色 |
水溶解性 | insoluble in water |
五味子酯甲 用途与合成方法
五味子果仁的乙醇提取物中分离得到去氧五味子素、五味子素、五味子乙素、五味子丙素、五味子醇乙、五味子酯甲和五味子酯乙等7个有降转氨酶活性的联苯环辛烯类木脂素。七种成份都有降低SGPT、促进肝糖元生成和延长戊巴比妥睡眠时间的作用。五味子酯乙降SGPT作用最强,五味子醇乙促进肝糖元生成作用最显著,五味子丙素延长戊巴比妥睡眠时间作用最突出。 五味子为木兰科植物五味子Schisandra chinensis (Turcz.) Baill. 的干燥成熟果实。主要含有木脂素类、挥发油类、多糖类等成分。
南五味子中木脂素类成分主要有五味子酯甲、乙、丙、丁、戊和去氧五味子素。主要是五味子酯甲,含量较高。木脂素成分除五味子酯戊外,结构式在B环上都有亚甲二氧基,都可与变色酸反应。所以用五味子酯甲为对照,测得的结果基本上反映了南五味子中总木脂素的含量。
(1) 对照品溶液的配制:取五味子酯甲对照品适量,精密称定,用甲醇配制成5mg/ml的溶液即得。
(2) 样品溶液的制备:取华中五味子 (南五味子) 果实粉末约1g,精密称定。置具塞瓶中,精密加入甲醇20ml,超声处理20min,放冷至室温,摇匀,过滤,弃去初滤液,取续滤液即得。
(3) 测定:精密吸取对照品溶液20μl,供试品溶液20μl,甲醇20μl分别置具塞试管中,水浴挥去甲醇,在三个残留物中分别各精密加入10%变色酸澄清水溶液0.5ml,浓硫酸3.0ml,蒸馏水1.5ml,摇匀,同置沸水浴中加热30min,迅速冷却,以上述甲醇管为空白,照分光光度法,在570nm波长处分别测定吸收度,计算即得。
(4) 测定结果:对不同产地的南五味子药材,按所拟定的方法操作,测得其结果。 Schisantherin A (Gomisin C, Schisanwilsonin H, Arisanschinin K)是一种五味子红素,具有止咳、镇静、消炎、抗骨质疏松、神经保护、增强认知和心脏保护活性。Schisantherin A 也可通过IκBα降解抑制p65-NF-κB向核内移位。
Target | Value |
NF-κB
() |
The concentrations of TNF-α and IL-6 in the supernatant of cells pretreated with 2.5 or 25 mg/L of Schisantherin A are significantly decreased compared to the LPS control group (p<0.05, p<0.01). The potential cytotoxicity of Schisantherin A is evaluated by the MTT assay after incubating cells for 24 h in the absence or presence of LPS, result shows cell viabilities are not affected by the cytokines at concentrations used (0.5, 2.5, 25 mg/L). RAW 264.7 murine macrophage cells are pre-incubated with Schisantherin A for 1 h and then stimulated with 1 mg/L LPS for 12 h. Both LPS and samples are untreated in control group. After the cell culture media are collected, nitrite and PGE 2 levels are determined, and Schisantherin A is found to reduce NO and PGE 2 production in a dose-dependent manner.
Schisantherin A, a dibenzocyclooctadiene lignan isolated from the fruit of Schisandra sphenanthera , has been reported to possess varied beneficial pharmacological effects. Schisantherin A protects lipopolysaccharide-induced acute respiratory distress syndrome in mice through inhibiting NF-κB and MAPKs signaling pathways. Pretreatment with Schisantherin A markedly ameliorates LPS-induced histopathologic changes and decreases the levels of TNF-α, IL-6 and IL-1β in the BALF. In addition, the phosphorylation of NF-κB p65, IκB-α, JNK, ERK and p38 induced by LPS are suppressed by Schisantherin A. The lung wet/dry weight ratio is evaluated at 7 h after the intranasal instillation of LPS. The results show that there are no differences between control group and Schisantherin A (40 mg/kg) group (p>0.05). LPS causes a significant increase in lung wet/dry weight ratio (p<0.01) compared with the control group. Schisantherin A dose-dependently decreases the lung wet/dry weight ratio (p<0.05) compared to those in the LPS group.
五味子酯甲 价格(试剂级)
更新日期 | 产品编号 | 产品名称 | CAS号 | 包装 | 价格 |
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2024-11-08 | HY-N0694 | 5 mg | 173 | ||
2024-11-08 | HY-N0694 | 五味子酯甲 | 58546-56-8 | 10mg | 259 |