异甜菊醇
异甜菊醇 性质
| 熔点 | 228.0 to 232.0 °C |
|---|---|
| 沸点 | 455.6±38.0 °C(Predicted) |
| 密度 | 1.15±0.1 g/cm3(Predicted) |
| 储存条件 | Sealed in dry,Room Temperature |
| 溶解度 | DMSO:81.5(最大浓度 mg/mL);255.92(最大浓度 mM) |
| 酸度系数(pKa) | 4.69±0.60(Predicted) |
| 颜色 | 白色到近乎白色 |
异甜菊醇 用途与合成方法
Isosteviol ((-)-Isosteviol) dose-dependently relaxed the vasopressin (10
-8
M)-induced vasoconstriction in isolated aortic rings with or without endothelium. However, in the presence of potassium chloride (3×10
-2
M), the vasodilator effect of isosteviol on arterial strips disappeared. Only the inhibitors specific for the ATP-sensitive potassium (KATP) channel or small conductance calcium-activated potassium (SKCa) channel inhibited the vasodilator effect of isosteviol in isolated aortic rings contracted with 10
-8
M vasopressin.
The attenuation by isosteviol of the vasopressin- and phenylephrine-induced increase in [Ca
2+
]i was inhibited by glibenclamide, apamin and 4-aminopyridine but not by charybdotoxin. Furthermore, the inhibitory action of isosteviol on [Ca
2+
]i was blocked when A7r5 cells co-treated with glibenclamide and apamin in conjunction with 4-aminopyridine were present.
Isosteviol (1-100 micromol/l) inhibits angiotensin-II-induced DNA synthesis and endothelin-1 secretion. Measurements of 2'7'-dichlorofluorescin diacetate, a redox-sensitive fluorescent dye, showed an isosteviol-mediated inhibition of intracellular reactive oxygen species generated by the effects of angiotensin II.
