Catalog No. Size PriceQuantity
M12106-2 2mg solid $220
M12106-10 10mg solid $805


Ochromycinone ((Rac)-STA-21) is a natural antibiotic and a STAT3 inhibitor. Ochromycinone can inhibits STAT3 DNA binding activity, STAT3 dimerization. Ochromycinone has anticancer and antimicrobial activity.

Product information

CAS Number: 111540-00-2

Molecular Weight: 306.31

Formula: C19H14O4



Chemical Name: 8-hydroxy-3-methyl-1, 2, 3, 4, 7, 12-hexahydrotetraphene-1, 7, 12-trione

Smiles: CC1CC(=O)C2=C3C(=CC=C2C1)C(=O)C1=C(O)C=CC=C1C3=O


InChi: InChI=1S/C19H14O4/c1-9-7-10-5-6-12-17(15(10)14(21)8-9)19(23)11-3-2-4-13(20)16(11)18(12)22/h2-6,9,20H,7-8H2,1H3

Technical Data

Appearance: Solid Power

Purity: ≥98% (or refer to the Certificate of Analysis)

Solubility: DMSO : 16.67 mg/mL (54.42 mM; Need ultrasonic)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥360 days if stored properly.

Stock Solution Storage: 0 - 4 oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined

HS Tariff Code: 382200

How to use

In Vitro:

STA-21 inhibits STAT3 DNA binding activity, STAT3 dimerization, and STAT3-dependent luciferase activity. Moreover, STA-21 reduces the survival of breast carcinoma cells with constitutive STAT3 signaling but has minimal effect on the cells in which constitutive STAT3 signaling is absent.


  1. Song H, et al. A low-molecular-weight compound discovered through virtual database screening inhibits Stat3 function in breast cancer cells. Proc Natl Acad Sci U S A. 2005 Mar 29;102(13):4700-5.
  2. Nataliya I. Kalinovskaya, et al. New Angucyclinones from the Marine Mollusk Associated Actinomycete Saccharothrix espanaensis An 113. Natural product communications. 2008, 3(10):1611-1616.

Products are for research use only. Not for human use.

Payment & Security

American Express Diners Club Discover JCB Mastercard PayPal Venmo Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Estimate shipping

You may also like

Recently viewed