Name: RS-127445
Brand: Selleck Chemicals
SKU: S2698
Availability: InStock
Rating: 5 (4 reviews)

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Quality Control

Batch: S269801 DMSO]56 mg/mL]false]Ethanol]8 mg/mL]false]Water]Insoluble]false Purity: 98.72%

Cited in Nature Medicine for its top-tier quality
COA
NMR
SDS
Datasheet

98.72

Related Targets	Adrenergic Receptor AChR COX Calcium Channel Histamine Receptor Dopamine Receptor GABA Receptor TRP Channel Cholinesterase (ChE) GluR
Other 5-HT Receptor Inhibitors	Puerarin WAY-100635 Maleate Serotonin (5-HT) HCl BRL-15572 Dihydrochloride SB269970 HCl Ketanserin Azacyclonol Nuciferine Flopropione SB742457

Solubility

In vitro
Batch:

DMSO : 56 mg/mL (199.05 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 8 mg/mL

Water : Insoluble

Molarity Calculator

Mass	Concentration	Volume	Molecular Weight
Mass value Mass unit	Concentration value Concentration unit	Volume value Volume unit	Molecular weight (g/mol)

Dilution Calculator Molecular Weight Calculator

In vivo batch selection In vivo Batch:
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	5%DMSO 1 Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	2.800mg/ml (9.95mM)	Taking the 1 mL working solution as an example, add 50 μL of 56 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results.
Clear solution	2%DMSO 1 30%PEG300 2 5%TWEEN80 3 63%ddH2O Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	1.000mg/ml (3.55mM)	Taking the 1 mL working solution as an example, add 20 μL of 50 mg/ml clarified DMSO stock solution to 300 μL of PEG300, mix evenly to clarify it; add 50 μL of Tween80 to the above system, mix evenly to clarify; then continue to add 630 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results.

In vivo Formulation Calculator (Clear solution)

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

Dosage: mg/kg

Average weight of animals: g

Dosing volume per animal: μL

Number of animals:

Step 2: Enter the in vivo formulation (This is only the calculator, not formulation. Please contact us first if there is no in vivo formulation at the solubility Section.)

% DMSO

%

% Tween 80

% ddH₂O

% DMSO

+

%

Calculation results:

Working concentration: mg/ml;

Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid 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 master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH₂O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

Note: 1. Please make sure the liquid is clear before adding the next solvent.
2. Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such
as vortex, ultrasound or hot water bath can be used to aid dissolving.

Chemical Information, Storage & Stability

Molecular Weight	281.33	Formula	C₁₇H₁₆FN₃	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	199864-87-4	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	MT500			Smiles	CC(C)C1=NC(=NC(=C1)C2=CC=C(C3=CC=CC=C32)F)N

Mechanism of Action

Targets/IC₅₀/Ki	5-HT2B 10.4(pIC50) 5-HT2B 9.5(pKi)
In vitro	RS-127445 is a novel high affinity, selective 5-HT2B receptor antagonist devoid of detectable intrinsic activity. This compound is found to have nM affinity and 1000 fold selectivity for the 5-HT2B receptor. It is thus among the highest affinity, most selective 5- HT2B receptor ligands. This chemical potently blocks the 5-HT evoked increase in inositol phosphate formation and blocks the 5-HT evoked increases in intracellular calcium concentrations with a potency 1000 times greater than that of yohimbine.
Kinase Assay	Radioligand binding
Kinase Assay	The selectivity of RS-127445 for 5-HT2B receptors is examined by testing this compound for affinity at over 100 additional ion channel or receptor binding sites. CHO-K1 cells expressing human 5-HT2A, 5-HT2B or 5-HT2C receptors are harvested using 2 mM EDTA in phosphate buffered saline. Cell membranes are prepared by four cycles of homogenization and centrifugation (48,000×g for 15 min). Each assay is established so as to achieve steady state conditions and to optimize specific binding. For the 5-HT2A receptor, membranes from 1×10⁶ cells are incubated with 0.2 nM [³ H]-ketanserin at 32 °C for 60 min. Nonspecific binding is determined using 10 μM methysergide. For the 5-HT2B receptor, membranes from 1.5×10⁶ cells are incubated with 0.2 nM [³ H]-5-HT at 48 °C for 120 min. Nonspecific binding is determined using 10 μM 5-HT. For the 5-HT2Creceptor, membranes from 3×10⁵ cells are incubated with 0.5 nM [³ H]-mesuler -gine at 32 °C for 60 min. Nonspecific binding is determined using 10μM methysergide. Assays are terminated by vacuum filtration through glass fibre filters(GF/B) which has been pretreated with 0.1% polyethyleneimine. Total and bound radioactivity is determined by liquid scintillation counting. Greater than 90% specific binding is achieved in each of these assays.
In vivo	LD50: Mice 391.4mg/kg (i.v.); Rats 370.1mg/kg (i.v.); Rabbits 142.3mg/kg (i.v.)
References	[1] https://pubmed.ncbi.nlm.nih.gov/10455251/ [2] http://www.ncbi.nlm.nih.gov/pubmed/ 19740115 [3] https://pubmed.ncbi.nlm.nih.gov/19371340/

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RS-127445 5-HT Receptor antagonist

Chemical Structure

Molecular Weight: 281.33