Catalog No. Size 价格库存数量
S0956-2 2mg solid ¥220
S0956-10 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.


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