Ralaniten triacetate (EPI-506)

Cat No.:V67599 Purity: ≥98%

COA Product Data Instructions for use SDS

Ralaniten triacetate (EPI-506), the precursor of Ralaniten, is a first-in-class, orally bioactive androgen receptor (AR) N-terminal domain (NTD) inhibitor.

Ralaniten triacetate (EPI-506) Chemical Structure CAS No.: 1637573-04-6
Product category: Androgen Receptor

This product is for research use only, not for human use. We do not sell to patients.

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Other Forms of Ralaniten triacetate (EPI-506):

Ralaniten

Official Supplier of:

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Product Description
Bioactivity & Protocols
Physicochemical Properties
Solubility Data
Calculators

Product Description

Ralaniten triacetate (EPI-506), the precursor of Ralaniten, is a first-in-class, orally bioactive androgen receptor (AR) N-terminal domain (NTD) inhibitor. Ralaniten triacetate has activity against full-length and resistance-associated AR species such as AR-v7.

Biological Activity I Assay Protocols (From Reference)

ln Vitro	For the treatment of metastatic castration-resistant prostate cancer (mCRPC), ralaniten triacetate (EPI-506) is used. It targets the N-terminal domain of the androgen receptor (AR). By attaching to the N-terminal domain (NTD), a novel target on the AR, EPI-506 is a first-in-class, highly-specific small molecule that directly inhibits AR transcriptional activity by preventing the AR from interacting with transcriptional proteins[2].
References	[1]. Revealing Metabolic Liabilities of Ralaniten To Enhance Novel Androgen Receptor Targeted Therapies. ACS Pharmacol Transl Sci. 2019;2(6):453-467. Published 2019 Sep 26. [2]. Efficacy, safety, tolerability, and pharmacokinetics of EPI-506 (ralaniten acetate), a novel androgen receptor (AR) N-terminal domain (NTD) inhibitor, in men with metastatic castration-resistant prostate cancer (mCRPC) progressing after enzalutamide and/or abiraterone. Journal of Clinical Oncology 35 (2017): 5032-5032.
Additional Infomation	Ralaniten Acetate is an orally bioavailable, small molecule inhibitor of the acetate form of ralaniten, a N-terminal domain (NTD) of the androgen receptor (AR), with potential antineoplastic activity. Upon oral administration of ralaniten acetate, ralaniten specifically binds to the NTD of AR, thereby inhibiting both AR activation and the AR-mediated signaling pathway. This inhibits cell growth in AR-overexpressing tumor cells. AR is overexpressed in prostate cancers and is involved in proliferation, survival and chemoresistance of tumor cells.

These protocols are for reference only. InvivoChem does not independently validate these methods.

Physicochemical Properties

Molecular Formula	C27H33CLO8
Exact Mass	520.186
CAS #	1637573-04-6
Related CAS #	Ralaniten;1203490-23-6
PubChem CID	86278934
Appearance	Colorless to light yellow liquid
LogP	5.1
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	8
Rotatable Bond Count	16
Heavy Atom Count	36
Complexity	696
Defined Atom Stereocenter Count	2
SMILES	CC(=O)OC[C@H](COC1=CC=C(C=C1)C(C)(C)C2=CC=C(C=C2)OC[C@@H](CCl)OC(=O)C)OC(=O)C
InChi Key	HGHVYYKTOXUQNT-CLJLJLNGSA-N
InChi Code	InChI=1S/C27H33ClO8/c1-18(29)32-16-26(36-20(3)31)17-34-24-12-8-22(9-13-24)27(4,5)21-6-10-23(11-7-21)33-15-25(14-28)35-19(2)30/h6-13,25-26H,14-17H2,1-5H3/t25-,26-/m1/s1
Chemical Name	[(2S)-2-acetyloxy-3-[4-[2-[4-[(2S)-2-acetyloxy-3-chloropropoxy]phenyl]propan-2-yl]phenoxy]propyl] acetate
HS Tariff Code	2934.99.9001
Storage	Powder -20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month
Shipping Condition	Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

Solubility Data

Solubility (In Vitro)	DMSO: 100 mg/mL (191.94 mM)
Solubility (In Vivo)	Solubility in Formulation 1: 2.5 mg/mL (4.80 mM) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), suspension solution; with sonication. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL. Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution. Solubility in Formulation 2: 2.5 mg/mL (4.80 mM) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), suspension solution; with ultrasonication. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly. Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution. View More Solubility in Formulation 3: ≥ 2.5 mg/mL (4.80 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly. (Please use freshly prepared in vivo formulations for optimal results.)

Solubility (In Vitro)

DMSO: 100 mg/mL (191.94 mM)

Solubility (In Vivo)

Solubility in Formulation 1: 2.5 mg/mL (4.80 mM) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), suspension solution; with sonication.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL.
Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution.

Solubility in Formulation 2: 2.5 mg/mL (4.80 mM) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), suspension solution; with ultrasonication.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly.
Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.

View More

Solubility in Formulation 3: ≥ 2.5 mg/mL (4.80 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.

(Please use freshly prepared in vivo formulations for optimal results.)

Calculator

Mass

Concentration

Volume

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Molarity Calculator allows you to calculate the mass, volume, and/or concentration required for a solution, as detailed below:

Calculate the Mass of a compound required to prepare a solution of known volume and concentration
Calculate the Volume of solution required to dissolve a compound of known mass to a desired concentration
Calculate the Concentration of a solution resulting from a known mass of compound in a specific volume

See Example

An example of molarity calculation using the molarity calculator is shown below:
What is the mass of compound required to make a 10 mM stock solution in 5 ml of DMSO given that the molecular weight of the compound is 350.26 g/mol?

Enter 350.26 in the Molecular Weight (MW) box
Enter 10 in the Concentration box and choose the correct unit (mM)
Enter 5 in the Volume box and choose the correct unit (mL)
Click the “Calculate” button
The answer of 17.513 mg appears in the Mass box. In a similar way, you may calculate the volume and concentration.

Concentration (Start)

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Concentration (End)

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Dilution Calculator allows you to calculate how to dilute a stock solution of known concentrations. For example, you may Enter C1, C2 & V2 to calculate V1, as detailed below:

What volume of a given 10 mM stock solution is required to make 25 ml of a 25 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=25 μM, V2=25 ml and V1 is the unknown:

Enter 10 into the Concentration (Start) box and choose the correct unit (mM)
Enter 25 into the Concentration (End) box and select the correct unit (mM)
Enter 25 into the Volume (End) box and choose the correct unit (mL)
Click the “Calculate” button
The answer of 62.5 μL (0.1 ml) appears in the Volume (Start) box

Molecular formula

Total molecular weight

g/mol

Molecular Weight Calculator allows you to calculate the molar mass and elemental composition of a compound, as detailed below:

Note: Chemical formula is case sensitive: C12H18N3O4 c12h18n3o4
Instructions to calculate molar mass (molecular weight) of a chemical compound:

To calculate molar mass of a chemical compound, please enter the chemical/molecular formula and click the “Calculate’ button.

Definitions of molecular mass, molecular weight, molar mass and molar weight:

Molecular mass (or molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.

Volume (to add to vial)

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Desired Reconstitution Concentration

Reconstitution Calculator allows you to calculate the volume of solvent required to reconstitute your vial.

Enter the mass of the reagent and the desired reconstitution concentration as well as the correct units
Click the “Calculate” button
The answer appears in the Volume (to add to vial) box

In vivo Formulation Calculator (Clear solution)

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

Dosage mg/kg

Average weight of animals g

Dosing volume per animal μL

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Step 2: Enter in vivo formulation (This is only a calculator, not the exact formulation for a specific product. Please contact us first if there is no in vivo formulation in the solubility section.)

% DMSO

% Tween 80

% ddH₂O

Calculation results

Working concentration： mg/mL；

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

Note： (1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
(2) Be sure to add the solvent(s) in order.