| ≥1 piece |
The melting point of 200 ～ 240 ℃ , polarimetry -164 ° (c=0.1, 60% acetone), optical rotation -24 ° (c=0.2, 70% two oxygen six ring). Insoluble in water, benzene, ether, chloroform, slightly soluble in methanol, ethanol, acetone ether two glycosides, two oxygen ring six, soluble in sodium bicarbonate solution. 【 Pharmacological properties 】 The melting point of 200 ～ 240 ℃ , polarimetry -164 ° (c=0.1, 60% acetone), optical rotation -24 ° (c=0.2, 70% two oxygen six ring). Insoluble in water, benzene, ether, chloroform, slightly soluble in methanol, ethanol, acetone ether two glycosides, two oxygen ring six, soluble in sodium bicarbonate solution.