STA-21
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    WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 406525

CAS#: 111540-00-2

Description: STA-21 is a promising STAT-3 inhibitor that reciprocally regulates Th17 and Treg cells, inhibits osteoclastogenesis in mice and humans and alleviates autoimmune inflammation in an experimental model of rheumatoid arthritis. STA-21 improved the clinical course of arthritis in IL-1Ra-KO mice. It increased not only the number of Treg cells but also the function of the Treg cells. It also suppressed Th17 cells and osteoclast formation. These data suggest that STA-21 might be an effective treatment for patients with RA.

Chemical Structure

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STA-21
CAS# 111540-00-2
Instruction

Theoretical Analysis

MedKoo Cat#: 406525
Name: STA-21
CAS#: 111540-00-2
Chemical Formula: C19H14O4
Exact Mass: 306.09
Molecular Weight: 306.310
Elemental Analysis: C, 74.50; H, 4.61; O, 20.89

Price and Availability

Size Price Availability Quantity
1mg USD 320 2 Weeks
5mg USD 950 2 Weeks
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Synonym: STA21; STA 21; STA21; Ochromycinone; NSC 628869.

IUPAC/Chemical Name: 8-hydroxy-3-methyl-3,4-dihydrotetraphene-1,7,12(2H)-trione

InChi Key: ZAWXOCUFQSQDJS-UHFFFAOYSA-N

InChi Code: 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

SMILES Code: O=C1CC(C)CC2=CC=C3C(C(C4=CC=CC(O)=C4C3=O)=O)=C12

Appearance: white solid powder

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

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO, not in water

Shelf Life: >2 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

Product Data:
Product Data
Instruction:
View handling instruction
Biological target:
In vitro activity:
In vivo activity:

Preparing Stock Solutions

The following data is based on the product molecular weight 306.310000000000000000000000000000 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL
Formulation protocol:
In vitro protocol:
In vivo protocol:

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1: Park JS, Kwok SK, Lim MA, Kim EK, Ryu JG, Kim SM, Oh HJ, Ju JH, Park SH, Kim HY, Cho ML. STA-21, a promising STAT-3 inhibitor that reciprocally regulates Th17 and Treg cells, inhibits osteoclastogenesis in mice and humans and alleviates autoimmune inflammation in an experimental model of rheumatoid arthritis. Arthritis Rheumatol. 2014 Apr;66(4):918-29. doi: 10.1002/art.38305. PubMed PMID: 24757144. 2: Park JS, Kwok SK, Lim MA, Kim EK, Ryu JG, Kim SM, Oh HJ, Ju JH, Park SH, Kim HY, Cho ML. STA-21, a promising STAT3 inhibitor that reciprocally regulates Th17 and Treg, inhibits osteoclastogenesis and alleviates autoimmune inflammation. Arthritis Rheum. 2013 Dec 10. doi: 10.1002/art.38305. [Epub ahead of print] PubMed PMID: 24338788. 3: Miyoshi K, Takaishi M, Nakajima K, Ikeda M, Kanda T, Tarutani M, Iiyama T, Asao N, DiGiovanni J, Sano S. Stat3 as a therapeutic target for the treatment of psoriasis: a clinical feasibility study with STA-21, a Stat3 inhibitor. J Invest Dermatol. 2011 Jan;131(1):108-17. doi: 10.1038/jid.2010.255. Epub 2010 Sep 2. PubMed PMID: 20811392.