Qianhucoumarin DCAS# 20516-19-2 |
Quality Control & MSDS
Package In Stock
Number of papers citing our products
| Cas No. | 20516-19-2 | SDF | Download SDF |
| PubChem ID | N/A | Appearance | Powder |
| Formula | C18H18O7 | M.Wt | 346.33 |
| Type of Compound | Coumarins | Storage | Desiccate at -20°C |
| Synonyms | 3\'(S),4\'(S)-Diacetoxydihydroseselin | ||
| Solubility | Soluble in Chloroform,Dichloromethane,Ethyl Acetate,DMSO,Acetone,etc. | ||
| General tips | For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months. We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months. Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it. |
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| About Packaging | 1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial. 2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial. 3. Try to avoid loss or contamination during the experiment. |
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| Shipping Condition | Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request. | ||
Qianhucoumarin D Dilution Calculator
Qianhucoumarin D Molarity Calculator
| 1 mg | 5 mg | 10 mg | 20 mg | 25 mg | |
| 1 mM | 2.8874 mL | 14.4371 mL | 28.8742 mL | 57.7484 mL | 72.1855 mL |
| 5 mM | 0.5775 mL | 2.8874 mL | 5.7748 mL | 11.5497 mL | 14.4371 mL |
| 10 mM | 0.2887 mL | 1.4437 mL | 2.8874 mL | 5.7748 mL | 7.2185 mL |
| 50 mM | 0.0577 mL | 0.2887 mL | 0.5775 mL | 1.155 mL | 1.4437 mL |
| 100 mM | 0.0289 mL | 0.1444 mL | 0.2887 mL | 0.5775 mL | 0.7219 mL |
| * Note: If you are in the process of experiment, it's necessary to make the dilution ratios of the samples. The dilution data above is only for reference. Normally, it's can get a better solubility within lower of Concentrations. | |||||
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Preparative isolation and purification of coumarins from Peucedanum praeruptorum Dunn by high-speed counter-current chromatography.[Pubmed:15584226]
J Chromatogr A. 2004 Nov 19;1057(1-2):89-94.
A preparative high-speed counter-current chromatography (HSCCC) method for isolation and purification of coumarins from Peucedanum praeruptorum Dunn (Baihuaqianhu in Chinese) was successfully established by using light petroleum-ethyl acetate-methanol-water as the two-phase solvent system in gradient elution mode. The upper phase of light petroleum-ethyl acetate-methanol-water (5:5:5:5, v/v) was used as the stationary phase of HSCCC. The mobile phase used in HSCCC was the lower phase of light petroleum-ethyl acetate-methanol-water (5:5:5:5, v/v) and light petroleum-ethyl acetate-methanol-water (5:5:6.5:3.5, v/v) that was changed in gradient. Four kinds of coumarins and another unknown compound were obtained and yielded 5.3 mg of Qianhucoumarin D, 7.7 mg of Pd-Ib, 35.8 mg of (+)-praeruptorin A, 31.9 mg of (+)-praeruptorin B and 6.4 mg of unknown compound with the purity of 98.6%, 92.8%, 99.5%, 99.4% and 99.8% in one-step separation, respectively. The structures of the coumarins were identified by 1H NMR and 13C NMR.
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