NS-11021 is a novel, potent and selective activator of large-conductance Ca2+-activated potassium channels (BKCa, KCa1.1). BK channel activation by NS11021 decreases excitability and contractility of urinary bladder smooth muscle. NS11021 enhances erectile responses in rats.
Physicochemical Properties
| Molecular Formula | C16H9BRF6N6S |
| Molecular Weight | 511.2444 |
| Exact Mass | 509.97 |
| Elemental Analysis | C, 37.59; H, 1.77; Br, 15.63; F, 22.30; N, 16.44; S, 6.27 |
| CAS # | 956014-19-0 |
| Related CAS # | 956014-19-0; |
| PubChem CID | 24825677 |
| Appearance | White to off-white solid powder |
| Density | 1.798±0.06 g/cm3(20 °C , 760mmHg) |
| Boiling Point | 507.5±60.0 °C (760 mmHg) |
| LogP | 5.621 |
| Hydrogen Bond Donor Count | 3 |
| Hydrogen Bond Acceptor Count | 10 |
| Rotatable Bond Count | 3 |
| Heavy Atom Count | 30 |
| Complexity | 586 |
| Defined Atom Stereocenter Count | 0 |
| SMILES | FC(C1C=C(C(F)(F)F)C=C(NC(NC2C(C3NN=NN=3)=CC(Br)=CC=2)=S)C=1)(F)F |
| InChi Key | INVIVOAFDIKYQMOMF-UHFFFAOYSA-N |
| InChi Code | InChI=1S/C16H9BrF6N6S/c17-9-1-2-12(11(6-9)13-26-28-29-27-13)25-14(30)24-10-4-7(15(18,19)20)3-8(5-10)16(21,22)23/h1-6H,(H2,24,25,30)(H,26,27,28,29) |
| Chemical Name | N'-[3,5-bis(trifluoromethyl)phenyl]-N-[4-bromo-2-(2H-tetrazol-5-yl)phenyl]-thiourea |
| Synonyms | NS-11021 NS 11021 NS11021. |
| HS Tariff Code | 2934.99.9001 |
| Storage |
Powder-20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month |
| Shipping Condition | Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs) |
Biological Activity
| ln Vitro | At a concentration of 3 μM, NS 11021 (1-30 μM) increases hKCa1.1 current from 2 μA to 4 μA and can dose-dependently activate hKCa1.1 channels in X. laevis eggs. The channel's hKCa1.1 current is increased by 171% by NS 11021 (3 μM), causing it to alternate between open and closed structures on a regular basis. NS 11021 (0-10 μM), a channel in X that keeps its structure closed. monoclonal HEK293 cells that consistently express hKCa1.1 can have their hKCa1.1 currents enhanced by laevis oocytes in a concentration-dependent way [1]. The frog gastrocnemius muscle's resting membrane potential (RMP) was unaffected by NS 11021 (5 or 50 μM, which increased current by 187%[1] M), but the action potential (AP) rise time was markedly and dose-dependently increased. Completely reversing the death of the upper stage of the AP complex caused by hydrogen peroxide in dividing myofibers, NS 11021 (1 μM) Attenuates the effects of CS+RW in Proximal Renal Renal Kubular Epithelial (NRK) cells (Cold for 18 hours and Rewarmed for 2 hours) on conductive mitoBK channels. cell death, depolarization, generation of superoxide, and respiratory failure [3]. |
| References |
[1]. The small molecule NS11021 is a potent and specific activator of Ca2+-activated big-conductance K+ channels. Mol Pharmacol. 2007 Oct;72(4):1033-44. [2]. BK channel openers NS1619 and NS11021 reverse hydrogen peroxide-induced membrane potential changes in skeletal muscle. J Recept Signal Transduct Res. 2020 Oct;40(5):449-455. [3]. Specific BK Channel Activator NS11021 Protects Rat Renal Proximal Tubular Cells from Cold Storage-Induced Mitochondrial Injury In Vitro. Biomolecules. 2019 Dec 4;9(12):825. |
Solubility Data
| Solubility (In Vitro) | DMSO : ~100 mg/mL (~195.60 mM) |
| Solubility (In Vivo) |
Solubility in Formulation 1: ≥ 2.08 mg/mL (4.07 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 20.8 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL. Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution. Solubility in Formulation 2: ≥ 2.08 mg/mL (4.07 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 20.8 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly. (Please use freshly prepared in vivo formulations for optimal results.) |
| Preparing Stock Solutions | 1 mg | 5 mg | 10 mg | |
| 1 mM | 1.9560 mL | 9.7801 mL | 19.5603 mL | |
| 5 mM | 0.3912 mL | 1.9560 mL | 3.9121 mL | |
| 10 mM | 0.1956 mL | 0.9780 mL | 1.9560 mL |