(R)-(+)-Bay-K-8644

Alias: (-)-BAY-K 8644; Bay-K 8644 (R)-(-)-; (R)-(-)-Bay-K-8644; Bay-K-8644 (S)-(-)-; (R)-(-)-Bay K-8644; (-)-BAY-R-5417; (-)-BAY-K-8644; (-)-BAY R-5417; BAYK 8644; BAYK8644; BAYK-8644.

Cat No.:V4180 Purity: ≥98%

COA Product Data Instructions for use SDS

R)-(+)-Bay-K-8644, the R-isomer ofBay-K-8644, is a novel and potent acalcium channelinhibitor/blocker that inhibits Ba2+currents (IBa) (IC50=975 nM).

(R)-(+)-Bay-K-8644 Chemical Structure CAS No.: 98791-67-4
Product category: Calcium Channel

This product is for research use only, not for human use. We do not sell to patients.

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Purity & Quality Control Documentation

Current batch：

Purity: ≥98%

COA

MSDS

Instructions

Product Description
Bioactivity & Protocols
Physicochemical Properties
Solubility Data
Calculators

Product Description

(R)-(+)-Bay-K-8644, the R-isomer of Bay-K-8644, is a novel and potent a calcium channel inhibitor/blocker that inhibits Ba2+ currents (IBa) (IC50=975 nM). (+/-)-Bay K 8644, a conventional racemic mixture of Bay K 8644, is widely used as an L-type Ca(2+) channel agonist.

Biological Activity I Assay Protocols (From Reference)

ln Vitro	(R)-(+)-Bay-K-8644 is a conventional racemic combination that is frequently employed as an L-type Ca2+ channel agonist (Bay K 8644). With (R)-(+)-Bay-K-8644 functioning as an antagonist and S(-)-Bay K 8644 working as an agonist, each optical isomer has opposing effects on IBa. Ba2+ current (IBa) is inhibited by (R)-(+)-Bay-K-8644 (IC50=975 nM). Applying (R)-(+)-Bay-K-8644 (0.5 μM) suppressed IBa to 71±10% of control. when (R)-(+)-Bay-K-8644IBa is present[1]. An inhibitor of calcium channels is (R)-(+)-Bay-K-8644 [2].
References	[1]. Zhu HL, et al. Antagonistic actions of S(-)-Bay K 8644 on cyclic nucleotide-induced inhibition of voltage-dependent Ba(2+) currents in guinea pig gastric antrum. Naunyn Schmiedebergs Arch Pharmacol. 2008 Dec;378(6):609-15. [2]. Sidaway P, et al. L-type Ca2+ channel sparklets revealed by TIRF microscopy in mouse urinary bladder smooth muscle. PLoS One. 2014 Apr 3;9(4):e93803.

ln Vitro

(R)-(+)-Bay-K-8644 is a conventional racemic combination that is frequently employed as an L-type Ca2+ channel agonist (Bay K 8644). With (R)-(+)-Bay-K-8644 functioning as an antagonist and S(-)-Bay K 8644 working as an agonist, each optical isomer has opposing effects on IBa. Ba2+ current (IBa) is inhibited by (R)-(+)-Bay-K-8644 (IC50=975 nM). Applying (R)-(+)-Bay-K-8644 (0.5 μM) suppressed IBa to 71±10% of control. when (R)-(+)-Bay-K-8644IBa is present[1]. An inhibitor of calcium channels is (R)-(+)-Bay-K-8644 [2].

References

[1]. Zhu HL, et al. Antagonistic actions of S(-)-Bay K 8644 on cyclic nucleotide-induced inhibition of voltage-dependent Ba(2+) currents in guinea pig gastric antrum. Naunyn Schmiedebergs Arch Pharmacol. 2008 Dec;378(6):609-15.
[2]. Sidaway P, et al. L-type Ca2+ channel sparklets revealed by TIRF microscopy in mouse urinary bladder smooth muscle. PLoS One. 2014 Apr 3;9(4):e93803.

These protocols are for reference only. InvivoChem does not independently validate these methods.

Physicochemical Properties

Molecular Formula	C16H15N2O4F3
Molecular Weight	356.2965
CAS #	98791-67-4
Related CAS #	Bay K 8644;71145-03-4;(S)-(-)-Bay-K-8644;98625-26-4
SMILES	O=C(C1=C(C)NC(C)=C([N+]([O-])=O)C1C2=CC=CC=C2C(F)(F)F)OC
InChi Key	ZFLWDHHVRRZMEI-UHFFFAOYSA-N
InChi Code	InChI=1S/C16H15F3N2O4/c1-8-12(15(22)25-3)13(14(21(23)24)9(2)20-8)10-6-4-5-7-11(10)16(17,18)19/h4-7,13,20H,1-3H3
Chemical Name	methyl 2,6-dimethyl-5-nitro-4-[2-(trifluoromethyl)phenyl]-1,4-dihydropyridine-3-carboxylate
Synonyms	(-)-BAY-K 8644; Bay-K 8644 (R)-(-)-; (R)-(-)-Bay-K-8644; Bay-K-8644 (S)-(-)-; (R)-(-)-Bay K-8644; (-)-BAY-R-5417; (-)-BAY-K-8644; (-)-BAY R-5417; BAYK 8644; BAYK8644; BAYK-8644.
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)

Solubility Data

Solubility (In Vitro)	DMSO : ≥ 300 mg/mL (~841.99 mM)
Solubility (In Vivo)	Solubility in Formulation 1: ≥ 2.5 mg/mL (7.02 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 25.0 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: 2.5 mg/mL (7.02 mM) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), suspension solution; with ultrasonication. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly. Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution. (Please use freshly prepared in vivo formulations for optimal results.)

Solubility (In Vitro)

DMSO : ≥ 300 mg/mL (~841.99 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 2.5 mg/mL (7.02 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 25.0 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: 2.5 mg/mL (7.02 mM) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), suspension solution; with ultrasonication.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly.
Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.

(Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	2.8066 mL	14.0331 mL	28.0662 mL
	5 mM	0.5613 mL	2.8066 mL	5.6132 mL
	10 mM	0.2807 mL	1.4033 mL	2.8066 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.

Calculator

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Molarity Calculator allows you to calculate the mass, volume, and/or concentration required for a solution, as detailed below:

Calculate the Mass of a compound required to prepare a solution of known volume and concentration
Calculate the Volume of solution required to dissolve a compound of known mass to a desired concentration
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An example of molarity calculation using the molarity calculator is shown below:
What is the mass of compound required to make a 10 mM stock solution in 5 ml of DMSO given that the molecular weight of the compound is 350.26 g/mol?

Enter 350.26 in the Molecular Weight (MW) box
Enter 10 in the Concentration box and choose the correct unit (mM)
Enter 5 in the Volume box and choose the correct unit (mL)
Click the “Calculate” button
The answer of 17.513 mg appears in the Mass box. In a similar way, you may calculate the volume and concentration.

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Dilution Calculator allows you to calculate how to dilute a stock solution of known concentrations. For example, you may Enter C1, C2 & V2 to calculate V1, as detailed below:

What volume of a given 10 mM stock solution is required to make 25 ml of a 25 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=25 μM, V2=25 ml and V1 is the unknown:

Enter 10 into the Concentration (Start) box and choose the correct unit (mM)
Enter 25 into the Concentration (End) box and select the correct unit (mM)
Enter 25 into the Volume (End) box and choose the correct unit (mL)
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The answer of 62.5 μL (0.1 ml) appears in the Volume (Start) box

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Molecular Weight Calculator allows you to calculate the molar mass and elemental composition of a compound, as detailed below:

Note: Chemical formula is case sensitive: C12H18N3O4 c12h18n3o4
Instructions to calculate molar mass (molecular weight) of a chemical compound:

To calculate molar mass of a chemical compound, please enter the chemical/molecular formula and click the “Calculate’ button.

Definitions of molecular mass, molecular weight, molar mass and molar weight:

Molecular mass (or molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.

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Reconstitution Calculator allows you to calculate the volume of solvent required to reconstitute your vial.

Enter the mass of the reagent and the desired reconstitution concentration as well as the correct units
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The answer appears in the Volume (to add to vial) box

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)

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Step 2: Enter in vivo formulation (This is only a calculator, not the exact formulation for a specific product. Please contact us first if there is no in vivo formulation in the solubility section.)

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Calculation results

Working concentration： mg/mL；

Method for preparing DMSO stock solution： mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.

Method for preparing in vivo formulation:：Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH₂O，mix and clarify.

Note： (1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
(2) Be sure to add the solvent(s) in order.