Name: Ochromycinone (STA-21)
Brand: Selleck Chemicals
SKU: S7951
Availability: InStock
Rating: 5 (8 reviews)

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Quality Control

Batch: Purity: 99.66%

99.66

Related Targets	EGFR JAK Pim
Other STAT Inhibitors	Napabucasin (BBI608) Stattic NSC 74859 (S3I-201) Cryptotanshinone (Tanshinone C) C188-9 (TTI-101) SH-4-54 BP-1-102 AS1517499 Nifuroxazide HO-3867

Solubility

In vitro
Batch:

DMSO : 21 mg/mL (68.55 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 2 mg/mL

Water : 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.
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.
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.

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	306.31	Formula	C₁₉H₁₄O₄	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	111540-00-2	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	N/A			Smiles	CC1CC2=C(C(=O)C1)C3=C(C=C2)C(=O)C4=C(C3=O)C=CC=C4O

Mechanism of Action

Targets/IC₅₀/Ki	STAT3
In vitro	Ochromycinone (STA-21) inhibits Stat3 DNA binding activity, Stat3 dimerization, and Stat3-dependent luciferase activity in cells. It remarkably inhibits the growth and the survival of the breast carcinoma cells MDA-MB-231, MDA-MB-435s, and MDA-MB-468 that express persistently activated Stat3. In RH30 and RD2 cells, this compound also inhibits cell viability and growth and induced apoptosis through caspases 3, 8 and 9 pathways.
In vivo	In IL-1Ra–KO mice, Ochromycinone (STA-21) (0.5 mg/kg, i.p.) reduces the arthritis score and the incidence of arthritis by decreasing the proportion of Th17 cells and increasing the proportion of Treg cells expressing FoxP3.
References	[1] https://pubmed.ncbi.nlm.nih.gov/15781862/ [2] https://pubmed.ncbi.nlm.nih.gov/17598902/ [3] https://pubmed.ncbi.nlm.nih.gov/24757144/

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Handling Instructions

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Ochromycinone (STA-21) STAT inhibitor

Chemical Structure

Molecular Weight: 306.31