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475965 Sigma-Aldrich

c-Myc Inhibitor III, Mycro2 - Calbiochem

The c-Myc Inhibitor III, Mycro2 controls the biological activity of c-Myc.

Synonym: 5-(Thiophen-2-yl)-N-(thiophen-2-ylmethyl)-7-(trifluoromethyl)pyrazolo[1,5-a]pyrimidine-2-carboxamide, c-Myc Inhibitor III, Mycro2 - Calbiochem

  • Empirical Formula (Hill Notation) C17H11F3N4OS2

  • Molecular Weight 408.42



Related Categories Cell Biology, Cell Signaling and Neuroscience, DNA-RNA Transcription Regulators, Gene Regulation and Expression
Quality Level   100
assay   ≥99% (HPLC)
form   solid
mfr. no.   Calbiochem®
storage condition   OK to freeze
  protect from light
storage conditions   +2C to +8C
color   yellow
solubility   DMSO: 100 mg/mL, clear, yellow
shipped in   ambient


General description

A cell-permeable pyrazolopyrimidine-carbox

A cell-permeable pyrazolopyrimidine-carboxamide that selectively inhibits c-Myc-Max dimer DNA binding activity (IC50 = 23 µM) by preventing c-Myc-Max heterodimer formation, while affecting Max, Jun, C/EBPα homodimers, or Jun-Fos heterodimer DNA binding only at much higher concentrations (IC50 = ≥54 µM). Shown to selectively inhibit c-Myc-Max-dependent transcription (by 77% against E-Box promoter-driven reporter transcription at 10 µM), cancer proliferation, and anchorage-independent colony formation (Effective conc. 10-20 µM).


10 mg in Glass bottle

Biochem/physiol Actions

Cell permeable: yes

IC₅₀ = 23 and 54 µM for c-Myc/Max and Max/Max dimerization

Primary Target
α-helical dimerization motifs of c-Myc/Max factors

Reversible: yes

Secondary Target
α-helical dimerization motifs of Max/Max factors


Packaged under inert gas


Toxicity: Standard Handling (A)


Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 6 months at -20°C.

Other Notes

Kiessling, A., et al. 2006. Chem. Biol.13, 745.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety & Documentation

Safety Information

WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable
Protocols & Articles
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