1. GPCR/G Protein
  2. CRFR
  3. R121919

R121919 (NBI30775) is a potent and selective CRF1R antagonist with a Ki of 2 to 5 nM. R121919 has antidepressant and anxiolytic effects. R121919 alleviates defensive withdrawal in rats.

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

R121919 Chemical Structure

R121919 Chemical Structure

CAS No. : 195055-03-9

Size Price Stock Quantity
Solid + Solvent (Highly Recommended)
10 mM * 1ML in DMSO
ready for reconstitution
USD 121 In-stock
Solution
10 mM * 1ML in DMSO USD 121 In-stock
Solid
5 mg USD 110 In-stock
10 mg USD 176 In-stock
25 mg USD 369 In-stock
50 mg USD 590 In-stock
100 mg USD 944 In-stock
200 mg   Get quote  
500 mg   Get quote  

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Customer Review

Based on 2 publication(s) in Google Scholar

Other Forms of R121919:

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  • Biological Activity

  • Protocol

  • Purity & Documentation

  • References

  • Customer Review

Description

R121919 (NBI30775) is a potent and selective CRF1R antagonist with a Ki of 2 to 5 nM. R121919 has antidepressant and anxiolytic effects. R121919 alleviates defensive withdrawal in rats[1][2][3].

IC50 & Target

CRFR1

2-5 nM (Ki)

In Vitro

R121919 is a potent small-molecule CRF1 receptor antagonistwith high affinity for the CRF1 receptor and over 1000-fold weaker activity at the CRF2 receptor, CRF-binding protein, or 70 other receptor types[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

In Vivo

R121919 (NBI30775) dose dependently decreases adrenocorticopin hormone and Corticosterone (HY-B1618) responses to restraint stress in rats. Peak plasma adrenocorticopin hormone and corticosterone concentrations at a dose of 10 mg/kg R121919 are 9 and 25%, respectively[1].
R121919 reduces levels of anxiety in mice with a steep dose-response curve[2].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Molecular Weight

380.53

Formula

C22H32N6

CAS No.
Appearance

Solid

Color

White to off-white

SMILES

CCCN(C1=CC(C)=NC2=C(C3=CN=C(N(C)C)C=C3C)C(C)=NN21)CCC

Shipping

Room temperature in continental US; may vary elsewhere.

Storage
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 2 years
-20°C 1 year
Solvent & Solubility
In Vitro: 

Ethanol : 100 mg/mL (262.79 mM; Need ultrasonic)

DMSO : 6.2 mg/mL (16.29 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 2.6279 mL 13.1396 mL 26.2791 mL
5 mM 0.5256 mL 2.6279 mL 5.2558 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, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

  • 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% EtOH    40% PEG300    5% Tween-80    45% Saline

    Solubility: ≥ 2.5 mg/mL (6.57 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 EtOH 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% EtOH    90% (20% SBE-β-CD in Saline)

    Solubility: 2.5 mg/mL (6.57 mM); Suspended solution; Need ultrasonic

    This protocol yields a suspended solution of 2.5 mg/mL. Suspended solution can be used for oral and intraperitoneal injection.

    Taking 1 mL working solution as an example, add 100 μL EtOH 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
Animal Administration
[1][2]

Rats: For the restraint stress,R121919 is dissolved in an aqueous 70% (v/v) polyethylene glycol 400 solution, and serially diluted in this vehicle to the appropriate concentrations. The drug is injected i.v. in a volume of 1 mL/kg to Male Sprague-Dawley rats. For the defensive withdrawal experiments, R121919 solutions are made fresh the night before each experiment. R121919 is dissolved in a vehicle consisting of 5% (v/v) polyethoxylated castor oil[1].

Mice: R121919 is dissolved in an aqueous. The drug is administered orally (1 mL/100 g bodyweight) via a feeding tube to six to ten mice per group; the doses applied are 0.5, 1.0 and 5.0 mg/kg for the DBA/2NCRL mice and 1.0, 5.0, and 30 mg/kg for the DBA/2Ola strain; an additional (vehicle) group of mice receives water, while a further group of mice (untreated controls) are spared the aforementioned manipulations[2].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

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, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
DMSO / Ethanol 1 mM 2.6279 mL 13.1396 mL 26.2791 mL 65.6978 mL
5 mM 0.5256 mL 2.6279 mL 5.2558 mL 13.1396 mL
10 mM 0.2628 mL 1.3140 mL 2.6279 mL 6.5698 mL
15 mM 0.1752 mL 0.8760 mL 1.7519 mL 4.3799 mL
Ethanol 20 mM 0.1314 mL 0.6570 mL 1.3140 mL 3.2849 mL
25 mM 0.1051 mL 0.5256 mL 1.0512 mL 2.6279 mL
30 mM 0.0876 mL 0.4380 mL 0.8760 mL 2.1899 mL
40 mM 0.0657 mL 0.3285 mL 0.6570 mL 1.6424 mL
50 mM 0.0526 mL 0.2628 mL 0.5256 mL 1.3140 mL
60 mM 0.0438 mL 0.2190 mL 0.4380 mL 1.0950 mL
80 mM 0.0328 mL 0.1642 mL 0.3285 mL 0.8212 mL
100 mM 0.0263 mL 0.1314 mL 0.2628 mL 0.6570 mL
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R121919 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.

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Product Name:
R121919
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HY-14127
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