SML1603 Sigma-Aldrich


≥98% (HPLC)

Synonym: (S)-N-[1-{N′-Cyano-N-[3-(difluoromethoxy)phenyl]carbamimidoyl}-3-(3,4-dichlorophenyl)-4,5-dihydro-1H-pyrazol-4-yl]-N-ethyl-2-hydroxyacetamide

  • Empirical Formula (Hill Notation) C22H20Cl2F2N6O3

  • Molecular Weight 525.34

  •  PubChem Substance ID 329825489



Related Categories B, Bioactive Small Molecule Alphabetical Index, Bioactive Small Molecules, Cell Biology, Cell Signaling and Neuroscience,
Quality Level   100
assay   ≥98% (HPLC)
form   powder
optical activity   [α]/D -85 to -95°, c = 1 in methanol
color   white to beige
solubility   DMSO: 25 mg/mL, clear
storage temp.   2-8°C



5, 25 mg in glass bottle

Biochem/physiol Actions

BAY-598 is a potent, peptide-competitive chemical probe for SET and MYND domain-containing protein 2 (SMYD2), a lysine methyl transferase inhibitor that dimethylates histone H3K36 and methylates histone H3K4. SMYD2 also methylates Lys-370 of p53, leading to decreased DNA-binding activity. SMYD2 is over-expressed in several cancers with poor prognosis. BAY-598 inhibits in vitro methylation of p53K370 with an IC50 value of 27 nM and in cells with an IC50 value < 1 μM. BAY-598 is more than 100-fold selective over other histone methyltransferases and non-epigenetic targets. BAY-598 can be used with in vivo experiments. For full characterization details, please visit the BAY-598 probe summary on the Structural Genomics Consortium (SGC) website.

BAY-369 is the negative control for the active probe, BAY-598. To request a sample of the negative control from the SGC, click here.

To learn about other SGC chemical probes for epigenetic targets, visit

Features and Benefits

BAY-598 is an epigenetic chemical probe available through a partnership between Sigma Life Science and the Structural Genomics Consortium (SGC). To learn more and view other SGC epigenetic probes, visit

This compound is a featured product for Gene Regulation research. Click here to discover more featured Gene Regulation products. Learn more about bioactive small molecules for other areas of research at

Other Notes

BAY-598 has been expertly reviewed and recommended by the Chemical Probes Portal. For more information, please visit the BAY-598 probe summary on the Chemical Probes Portal website.

Safety & Documentation

Safety Information

NONH for all modes of transport


Certificate of Analysis (COA)

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Protocols & Articles


Discover Bioactive Small Molecules for Gene Regulation

The loss of regulation of gene expression is a key component to many human disease states, including neurodegenerative disorders, autoimmune conditions and, most prominently, cancers. Regulation of g...
Keywords: Acetylations, Epigenetics, Gene expression, Genomics, Methylations, PAGE, Post translational modifications, Transcription

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