|Source:||The herbs of Cynanchum stauntonii (Decne.) Schltr.ex Levl.|
|Biological Activity or Inhibitors:||1. Stauntosaponin A and stauntosaponin B show moderate inhibitory activities against Na+/K+-ATPase with IC50 values of 21 and 29 uM, respectively.
|Solvent:||Chloroform, Dichloromethane, Ethyl Acetate, DMSO, Acetone, etc.|
|Storage:||Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months(2-8C).
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
Need more advice on solubility, usage and handling? Please email to: firstname.lastname@example.org
|After receiving:||The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.|
|1 mg||5 mg||10 mg||20 mg||25 mg|
|1 mM||2.0551 mL||10.2754 mL||20.5508 mL||41.1015 mL||51.3769 mL|
|5 mM||0.411 mL||2.0551 mL||4.1102 mL||8.2203 mL||10.2754 mL|
|10 mM||0.2055 mL||1.0275 mL||2.0551 mL||4.1102 mL||5.1377 mL|
|50 mM||0.0411 mL||0.2055 mL||0.411 mL||0.822 mL||1.0275 mL|
|100 mM||0.0206 mL||0.1028 mL||0.2055 mL||0.411 mL||0.5138 mL|
Phytochemistry Letters, 2012, 5(2):304-308.
|Two secopregnane-type steroidal glycosides from Cynanchum stauntonii (Decne.) Schltr.ex Levl.[Reference: WebLink]|
|Two new steroid glycosides, Stauntosaponin A (1) and stauntosaponin B (2), were isolated from Cynanchum stauntonii (Decne.) Schltr.ex Levl. (Asclepiadaceae) together with five known compounds, anhydrohirundigenin monothevetoside, glaucogenin C mono-d-thevetoside, hirundoside A, cynatratoside A, and glaucogenin C. Stauntosaponins A and B were formulated as 3-O-β-d-oleandropyranosyl-14, 16: 15, 20: 18, 20-triepoxy-14, 15-secopregn-4, 6, 8(14)-triene (1) and 3-O-β-d-thevetopyranosyl-14, 16: 15, 20: 18, 20-triepoxy-14, 15-secopregn-4, 6, 8(14)-triene (2). Compounds 1 and 2 showed moderate inhibitory activities against Na+/K+-ATPase with IC50 values of 21 and 29 μM, respectively, whereas ouabain as a positive control displayed an IC50 value of 3.5 μM.|