2. GPCR/G Protein
  3. Oxytocin Receptor
  4. Retosiban

Retosiban  (Synonyms: GSK 221149; GSK 221149A)

Cat. No.: HY-14778 Purity: 98.97%
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Retosiban (GSK221149A) is a potent and selective oxytocin antagonist with a Ki of 0.65 nM.

For research use only. We do not sell to patients.

Retosiban Chemical Structure

Retosiban Chemical Structure

CAS No. : 820957-38-8

Size Price Stock Quantity
Solid + Solvent (Highly Recommended)
10 mM * 1 mL in DMSO
ready for reconstitution
 USD 748 In-stock
Solution
10 mM * 1 mL in DMSO USD 748 In-stock
Solid
5 mg USD 680 In-stock
10 mg USD 1100 In-stock
50 mg USD 3500 In-stock
100 mg USD 5500 In-stock
200 mg   Get quote  
500 mg   Get quote  

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This product is a controlled substance and not for sale in your territory.

Customer Review

Based on 1 publication(s) in Google Scholar

Other Forms of Retosiban:

Retosiban Related Antibodies

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  • Purity & Documentation

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Description

Retosiban (GSK221149A) is a potent and selective oxytocin antagonist with a Ki of 0.65 nM.

IC50 & Target

IC50: 0.65 nM (Oxytocin)[1]
Clinical Trial
Molecular Weight

494.58

Formula

C27H34N4O5
CAS No.
Appearance

Solid

Color

Off-white to yellow

SMILES

O=C([C@@H](C1CC2=C(C=CC=C2)C1)N3)N([C@H](C4=COC(C)=N4)C(N5CCOCC5)=O)[C@H]([C@H](CC)C)C3=O
Shipping

Room temperature in continental US; may vary elsewhere.
Storage
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 6 months
-20°C 1 month
Solvent & Solubility
In Vitro: 

DMSO : 100 mg/mL (202.19 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 2.0219 mL 10.1096 mL 20.2192 mL
5 mM 0.4044 mL 2.0219 mL 4.0438 mL
View the Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

  • Molarity Calculator

  • Dilution Calculator

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

Mass
=
Concentration
×
Volume
×
Molecular Weight *

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start)

C1

×
Volume (start)

V1

=
Concentration (final)

C2

×
Volume (final)

V2

In Vivo:

Select the appropriate dissolution method based on your experimental animal and administration route.

For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for in vivo experiments, it is recommended to prepare freshly and use it on the same day.
The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

  • Protocol 1

    Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% Saline

    Solubility: ≥ 2.5 mg/mL (5.05 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.

    Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
  • Protocol 2

    Add each solvent one by one:  10% DMSO    90% (20% SBE-β-CD in Saline)

    Solubility: ≥ 2.5 mg/mL (5.05 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.

    Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
In Vivo Dissolution Calculator
Please enter the basic information of animal experiments:

Dosage

mg/kg

Animal weight
(per animal)

g

Dosing volume
(per animal)

μL

Number of animals

Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Please enter your animal formula composition:
%
DMSO +
% 
+
%
Tween-80 +
%
Saline
Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
Calculation results:
Working solution concentration: mg/mL
Method for preparing stock solution: mg drug dissolved in μL  DMSO (Stock solution concentration: mg/mL).
The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only. If necessary, please contact MedChemExpress (MCE).
Method for preparing in vivo working solution for animal experiments: Take μL DMSO stock solution, add μL . μL , mix evenly, next add μL Tween 80, mix evenly, then add μL Saline.
 If the continuous dosing period exceeds half a month, please choose this protocol carefully.
Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
Purity & Documentation
References

Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
DMSO 1 mM 2.0219 mL 10.1096 mL 20.2192 mL 50.5479 mL
5 mM 0.4044 mL 2.0219 mL 4.0438 mL 10.1096 mL
10 mM 0.2022 mL 1.0110 mL 2.0219 mL 5.0548 mL
15 mM 0.1348 mL 0.6740 mL 1.3479 mL 3.3699 mL
20 mM 0.1011 mL 0.5055 mL 1.0110 mL 2.5274 mL
25 mM 0.0809 mL 0.4044 mL 0.8088 mL 2.0219 mL
30 mM 0.0674 mL 0.3370 mL 0.6740 mL 1.6849 mL
40 mM 0.0505 mL 0.2527 mL 0.5055 mL 1.2637 mL
50 mM 0.0404 mL 0.2022 mL 0.4044 mL 1.0110 mL
60 mM 0.0337 mL 0.1685 mL 0.3370 mL 0.8425 mL
80 mM 0.0253 mL 0.1264 mL 0.2527 mL 0.6318 mL
100 mM 0.0202 mL 0.1011 mL 0.2022 mL 0.5055 mL
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Retosiban Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

Keywords:

Retosiban820957-38-8GSK 221149 GSK 221149AGSK221149GSK-221149Oxytocin ReceptorOXTRInhibitorinhibitorinhibit

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