MedKoo Cat#: 406783 | Name: ML-281
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Description:

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

ML-281 is a potent ans selective STK33 inhibitor (IC50 = 14 nM). ML281 showed low nanomolar inhibition of purified recombinant STK33 and a distinct selectivity profile as compared to other STK33 inhibitors. ML281 is a valuable addition to small-molecule probes of STK33. v-Ki-ras2 Kirsten rat sarcoma viral oncogene homolog (KRAS) is the most mutated oncogene, and KRAS mutations have been found in up to 20% of all human tumors. STK33 was selectively toxic to KRAS-dependent cancer cell lines, suggesting that small-molecule inhibitors of STK33 might selectively target KRAS-dependent cancers.

Chemical Structure

ML-281
ML-281
CAS#1404437-62-2

Theoretical Analysis

MedKoo Cat#: 406783

Name: ML-281

CAS#: 1404437-62-2

Chemical Formula: C22H19N3O2S

Exact Mass: 389.1198

Molecular Weight: 389.47

Elemental Analysis: C, 67.85; H, 4.92; N, 10.79; O, 8.22; S, 8.23

Price and Availability

Size Price Availability Quantity
5mg USD 90.00 Ready to ship
10mg USD 150.00 Ready to ship
25mg USD 250.00 Ready to ship
50mg USD 450.00 Ready to ship
100mg USD 750.00 Ready to ship
200mg USD 1,250.00 Ready to ship
500mg USD 2,450.00 2 Weeks
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Related CAS #
No Data
Synonym
ML-281; ML-281; ML281.
IUPAC/Chemical Name
N-[2-(3,4-Dihydro-3-oxo-2-quinoxalinyl)-4-(1-methylethyl)phenyl]-2-thiophenecarboxamide
InChi Key
HWOYIOLMBQSTQS-UHFFFAOYSA-N
InChi Code
InChI=1S/C22H19N3O2S/c1-13(2)14-9-10-16(24-21(26)19-8-5-11-28-19)15(12-14)20-22(27)25-18-7-4-3-6-17(18)23-20/h3-13H,1-2H3,(H,24,26)(H,25,27)
SMILES Code
O=C(C1=CC=CS1)NC2=CC=C(C(C)C)C=C2C3=NC4=C(C=CC=C4)NC3=O
Appearance
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
More Info
Solvent mg/mL mM comments
Solubility
Soluble in DMSO, not in water 0.0 100.00
Note: There can be variations in solubility for the same chemical from different vendors or different batches from the same vendor. The following factors can affect the solubility of the same chemical: solvent used for crystallization, residual solvent content, polymorphism, salt versus free form, degree of hydration, solvent temperature. Please use the solubility data as a reference only. Warming and sonication will facilitate dissolving. Still have questions? Please contact our Technical Support scientists.

Preparing Stock Solutions

The following data is based on the product molecular weight 389.47 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
1: Spoonamore J, Weïwer M, Wei J, Guichard B, Ross NT, Masson K, Silkworth W, Dandapani S, Munoz B, Palmer M, Scherer C, Schreiber SL. Screen for Inhibitors of STK33 Kinase Activity. 2011 Dec 16 [updated 2014 May 13]. Probe Reports from the NIH Molecular Libraries Program [Internet]. Bethesda (MD): National Center for Biotechnology Information (US); 2010-. Available from http://www.ncbi.nlm.nih.gov/books/NBK133418/ PubMed PMID: 23658944. 2: Weïwer M, Spoonamore J, Wei J, Guichard B, Ross NT, Masson K, Silkworth W, Dandapani S, Palmer M, Scherer CA, Stern AM, Schreiber SL, Munoz B. A Potent and Selective Quinoxalinone-Based STK33 Inhibitor Does Not Show Synthetic Lethality in KRAS-Dependent Cells. ACS Med Chem Lett. 2012 Dec 13;3(12):1034-1038. Epub 2012 Oct 22. PubMed PMID: 23256033; PubMed Central PMCID: PMC3523537.