BS-181 hydrochloride

Name: BS-181 hydrochloride
Brand: MedChemExpress
SKU: HY-13266A
Rating: 5.0 (5 reviews)

Cat. No.: HY-13266A Purity: 99.80%: FAQs
Data Sheet SDS COA Handling Instructions

Molarity Calculator

BS-181 hydrochloride is a highly selective CDK7 inhibitor with IC₅₀ of 21 nM, and > 40-fold selective for CDK7 than CDK1, 2, 4, 5, 6, or 9.

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

BS-181 hydrochloride Chemical Structure

CAS No. : 1397219-81-6

Size	Price	Stock	Quantity

Free Sample (0.1 - 0.5 mg)		Apply Now
Solid + Solvent
10 mM * 1 mL in DMSO ready for reconstitution	USD 99	In-stock	Estimated Time of Arrival: December 31
Solution
10 mM * 1 mL in DMSO	USD 99	In-stock	Estimated Time of Arrival: December 31
Solid
5 mg	USD 90	In-stock	Estimated Time of Arrival: December 31
10 mg	USD 160	In-stock	Estimated Time of Arrival: December 31
25 mg	USD 350	In-stock	Estimated Time of Arrival: December 31
50 mg	USD 580	In-stock	Estimated Time of Arrival: December 31
100 mg	USD 990	In-stock	Estimated Time of Arrival: December 31
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 5 publication(s) in Google Scholar

Other Forms of BS-181 hydrochloride:

BS-181 dihydrochloride Get quote
BS-181 Get quote

4 Publications Citing Use of MCE BS-181 hydrochloride

: BS-181 hydrochloride purchased from MedChemExpress. Usage Cited in: Theranostics. 2017 Apr 20;7(7):1914-1927. [Abstract]; Effect of TPL on the levels of pAR S515 and related proteins in PCa cells. LNCaP and C4-2/AR-V7 cells are pretreated with TPL or BS-181 for 1 h, and then incubated with R1881 for 4 h.

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Biological Activity
Protocol
Purity & Documentation
References
Customer Review

Description

BS-181 hydrochloride is a highly selective CDK7 inhibitor with IC₅₀ of 21 nM, and > 40-fold selective for CDK7 than CDK1, 2, 4, 5, 6, or 9.

IC₅₀ & Target^[1]

CDK7/CycH/MAT1

0.021 μM (IC₅₀)

CDK2/Cyc E

0.88 μM (IC₅₀)

CDK5/p35NCK

3 μM (IC₅₀)

CDK9/cycT

4.2 μM (IC₅₀)

CDK1/cycB

8.1 μM (IC₅₀)

CDK4/Cyc D1

33 μM (IC₅₀)

CDK6/cycD1

47 μM (IC₅₀)

In Vitro

BS-181 promotes cell cycle arrest and inhibits cancer cell growth, and growth is inhibited for all cell lines tested, with IC₅₀ values ranging from 11.5 to 37 μM. BS-181 inhibits RB phosphorylation at Ser⁷⁹⁵ and Ser⁸²¹ with an apparent IC₅₀ of 15 μM, similar to the IC₅₀ obtained for P-Ser2 inhibition. BS-181 treatment of MCF-7 cells leads to G1 arrest at and apoptosis^[1]. BS-181 inhibits GC cell and normal gastric epithelial RGM-1 cell line growth with inhibitory concentration (IC₅₀) ranging from 17 to 22 μM and 6.5 μM, respectively. BS-181 significantly inhibits cell migration and invasion ability in a dose-dependent manner^[2].

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

In Vivo

BS-181 (5 mg/kg, 10 mg/kg, i.p.) inhibits the growth of MCF-7 tumors in nude mice. Intravenous (i.v) and i.p administration of 10 mg/kg BS-181 shows rapid clearance^[1]. BS-181 (10 mg/kg/d or 20 mg/kg/d, i.p.) significantly inhibits the growth of tumor in a dose-dependent manner compared to the control group^[2].

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

Molecular Weight

416.99

Formula

C₂₂H₃₃ClN₆

CAS No.

1397219-81-6

Appearance

Solid

Color

White to off-white

SMILES

CC(C1=C(N=C(C=C2NCC3=CC=CC=C3)NCCCCCCN)N2N=C1)C.[H]Cl

Shipping

Room temperature in continental US; may vary elsewhere.

Storage

4°C, sealed storage, away from moisture

*In solvent : -80°C, 2 years; -20°C, 1 year (sealed storage, away from moisture)

Solvent & Solubility

In Vitro:

H₂O : 100 mg/mL (239.81 mM; Need ultrasonic)

DMSO : ≥ 50 mg/mL (119.91 mM; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

*"≥" means soluble, but saturation unknown.

Preparing
Stock Solutions

Concentration Solvent Mass	1 mg	5 mg	10 mg

1 mM	2.3981 mL	11.9907 mL	23.9814 mL
5 mM	0.4796 mL	2.3981 mL	4.7963 mL
10 mM	0.2398 mL	1.1991 mL	2.3981 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 (sealed storage, away from moisture). When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

Molarity Calculator
Dilution Calculator

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

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

This equation is commonly abbreviated as: C₁V₁ = C₂V₂

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: ≥ 3 mg/mL (7.19 mM); Clear solution

This protocol yields a clear solution of ≥ 3 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (30.0 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: ≥ 3 mg/mL (7.19 mM); Clear solution

This protocol yields a clear solution of ≥ 3 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (30.0 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.
Protocol 3

Add each solvent one by one: 10% DMSO 90% Corn Oil
Solubility: ≥ 3 mg/mL (7.19 mM); Clear solution

This protocol yields a clear solution of ≥ 3 mg/mL (saturation unknown). If the continuous dosing period exceeds half a month, please choose this protocol carefully.
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (30.0 mg/mL) to 900 μL Corn oil, and mix evenly.

For the following dissolution methods, please prepare the working solution directly. It is recommended to prepare fresh solutions and use them promptly within a short period of time.
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: PBS
Solubility: 50 mg/mL (119.91 mM); Clear solution; Need ultrasonic

In Vivo Dissolution Calculator

Please enter the basic information of animal experiments:

Dosage

mg/kg

Animal weight
(per animal)

Dosing volume
(per animal)

μL

Number of animals

Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.

Calculation results:

Working solution concentration: mg/mL

This product has good water solubility, please refer to the measured solubility data in water/PBS/Saline for details.

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).

Purity & Documentation

Purity: 99.80%

Select Batch:

Data Sheet (279 KB) SDS (393 KB)

COA (248 KB) LCMS (268 KB)

Handling Instructions (2659 KB)

References

[1]. Ali S et al. The development of a selective cyclin-dependent kinase inhibitor that shows antitumor activity. Cancer Res. 2009 Aug 1;69(15):6208-15. [Content Brief]

[2]. Wang BY, et al. Selective CDK7 inhibition with BS-181 suppresses cell proliferation and induces cell cycle arrest and apoptosis in gastric cancer. Drug Des Devel Ther. 2016 Mar 16;10:1181-9. [Content Brief]

Cell Assay ^[2]	Cell viability is detected using Cell Counting Kit (CCK-8 kit) according to supplier’s introductions. Briefly, BGC823 cells are seeded at 10⁴ cells per well for 48 hours with or without BS-181. Then, the absorbance is detected at 450 nm (reference at 650 nm) in each well. MCE has not independently confirmed the accuracy of these methods. They are for reference only.
Animal Administration ^[2]	In total, 5×10⁶ BGC823 cells (0.1 mL) are injected subcutaneously into the flank of the mice. Tumor measurements are performed two times per week, and volumes are calculated using the formula: tumor size=(length ×width²)/2. Finally, 30 mice (tumor volume 100-200 mm³) are selected and randomLy assigned into three groups. As previously described, BS-181 is prepared in 10% dimethyl sulfoxide/50 mM HCl/5% Tween 20/85% saline. Micereceive BS-181 injection (ip) twice daily at indicated doses (BS-181 [10 mg/kg/d or 20 mg/kg/d] or Roscovitine [20 mg/kg/d]) for a total of 14 days. Control mice are injected with vehicles. Animal weights and tumor volume are measured each day throughout the 14-day treatment. In addition, all rats are kept for another 30 days for survival observation. Mice are injected intraperitoneally twice daily with BS-181 at 5 mg/kg or 10 mg/kg. MCE has not independently confirmed the accuracy of these methods. They are for reference only.
References	[1]. Ali S et al. The development of a selective cyclin-dependent kinase inhibitor that shows antitumor activity. Cancer Res. 2009 Aug 1;69(15):6208-15. [Content Brief] [2]. Wang BY, et al. Selective CDK7 inhibition with BS-181 suppresses cell proliferation and induces cell cycle arrest and apoptosis in gastric cancer. Drug Des Devel Ther. 2016 Mar 16;10:1181-9. [Content Brief]

Complete Stock Solution Preparation Table

Optional Solvent	Concentration Solvent Mass	1 mg	5 mg	10 mg	25 mg

DMSO / H₂O	1 mM	2.3981 mL	11.9907 mL	23.9814 mL	59.9535 mL
	5 mM	0.4796 mL	2.3981 mL	4.7963 mL	11.9907 mL
	10 mM	0.2398 mL	1.1991 mL	2.3981 mL	5.9953 mL
	15 mM	0.1599 mL	0.7994 mL	1.5988 mL	3.9969 mL
	20 mM	0.1199 mL	0.5995 mL	1.1991 mL	2.9977 mL
	25 mM	0.0959 mL	0.4796 mL	0.9593 mL	2.3981 mL
	30 mM	0.0799 mL	0.3997 mL	0.7994 mL	1.9984 mL
	40 mM	0.0600 mL	0.2998 mL	0.5995 mL	1.4988 mL
	50 mM	0.0480 mL	0.2398 mL	0.4796 mL	1.1991 mL
	60 mM	0.0400 mL	0.1998 mL	0.3997 mL	0.9992 mL
	80 mM	0.0300 mL	0.1499 mL	0.2998 mL	0.7494 mL
	100 mM	0.0240 mL	0.1199 mL	0.2398 mL	0.5995 mL

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.