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G15 Estrogen/progestogen Receptor antagonist

Name: G15
Brand: Selleck Chemicals
SKU: S6651
Availability: InStock
Rating: 5 (7 reviews)

Cat.No.S6651

G15 is a cell-permeable high affinity and selective G-protein coupled estrogen receptor 1 (GPER, GPR30) antagonist with an affinity of approximately 20 nM that displays no affinity for ERα and ERβ at concentrations up to 10 μM.

Chemical Structure

Molecular Weight: 370.24

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Quality Control

Batch: S665101 DMSO]74 mg/mL]false]Water]Insoluble]false]Ethanol]Insoluble]false Purity: 99.35%

Cited in Nature Medicine for its top-tier quality
COA
HPLC
SDS/MSDS
Datasheet

99.35

Related Targets	Adrenergic Receptor GPR Androgen Receptor Glucocorticoid Receptor ACE RAAS Progesterone Receptor Opioid Receptor THR PGES
Other Estrogen/progestogen Receptor Inhibitors	Elacestrant (RAD1901) Dihydrochloride Vepdegestrant (ARV-471) MPP dihydrochloride Kaempferol Cholesterol PHTPP Licochalcone A Endoxifen HCl Chrysin Pregnenolone

Solubility

In vitro
Batch:

DMSO : 74 mg/mL (199.87 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Water : Insoluble

Ethanol : 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 40%PEG300 2 5%Tween80 3 50%ddH2O Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	3.300mg/ml (8.91mM)	Taking the 1 mL working solution as an example, add 50 μL of 66 mg/ml clarified DMSO stock solution to 400 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 500 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results.
Clear solution	5% DMSO 1 95% Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	3.300mg/ml (8.91mM)	Taking the 1 mL working solution as an example, add 50 μL of 66 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.

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	370.24	Formula	C₁₉H₁₆BrNO₂	Storage (From the date of receipt)	3 years -20°C powder
CAS No.	1161002-05-6	--		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	GRB-G15			SMILES	C1C=CC2C1C(NC3=CC=CC=C23)C4=CC5=C(C=C4Br)OCO5

Read more about storage stability stock solution CAS number SMILES

Mechanism of Action

Targets/IC₅₀/Ki	GPER
In vitro	G15 inhibits GPER-mediated proliferation stimulated by 17β-estradiol (E2) in A549 and H1793 cell lines. This compound inhibits the response of GPER stimulated by E2 and G1 in A549 and H1793 cell lines.
In vivo	G15 decreases the number of tumor nodules and tumor index increased by the E2 or G1 group in urethane-induced adenocarcinoma mice.
References	[1] https://pubmed.ncbi.nlm.nih.gov/28877783/ [2] https://pubmed.ncbi.nlm.nih.gov/19430488/

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2025-10-06)

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT07050017	COMPLETED	Appetite; Energy Intake; Post-exercise; Negative Energy Balance	Hacettepe University	2025-05-29
NCT05173259	COMPLETED	Chewing Problem; Mastication Disorder	University of Barcelona	2021-12-01
NCT03753022	UNKNOWN	Coronary Artery Disease; Coronary Artery Bypass Grafting; Acute Lung Injury	Federal University of São Paulo	2012-01
NCT04130893	TERMINATED	Vasoconstriction Disorder of Extremities	Hôpital Européen Marseille	2019-01-17
NCT02518932	UNKNOWN	Insulin Resistance	Elahi, Dariush, PhD	2015-03	PHASE1
NCT02518932	Unknown status	Insulin Resistance	Elahi Dariush PhD\|ICON plc\|Massachusetts General Hospital\|National Institute on Aging (NIA)	2015-03	Phase 1

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