CAS No. 1255517-76-0

Batch: Purity:99.97
PF-4708671 Chemical Structure
Chemical Structure
Check the PF-4708671 product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

IUPAC Name 2-[[4-(5-ethylpyrimidin-4-yl)piperazin-1-yl]methyl]-6-(trifluoromethyl)-1H-benzimidazole
CAS Number 1255517-76-0
Molecular Formula

C19H21F3N6

Molecular Weight (MW) 390.41
SMILES CCC1=CN=CN=C1N2CCN(CC2)CC3=NC4=C(N3)C=C(C=C4)C(F)(F)F
InChIKey FBLPQCAQRNSVHB-UHFFFAOYSA-N

Ordering Information

Biological Activity

PF-4708671 is a cell-permeable inhibitor of p70 ribosomal S6 kinase 1 (S6K1) with a Ki of 20 nM and an IC50 of 160 nM, demonstrating 400-fold selectivity for S6K1 over S6K2. By suppressing S6K1 activity, PF-4708671 blocks phosphorylation of ribosomal protein S6 within the mTOR signaling pathway, suppressing downstream protein synthesis and inducing autophagy in cells. [1]

How to Prepare Stock Solution?

Concentration Volume Mass
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Solubility

Batch:
All in vitro solubility values are batch-tested experimental data (non-literature values).
Solvent Solubility & Note
DMSO 30 mg/mL (76.84 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
Ethanol 8 mg/mL
Water Insoluble
FAQ
Q: Why does a DMSO stock precipitate in media/saline?
A: It is caused by unheated aqueous media (supersaturation), local solvent shock, or incorrect mixing sequence.
How to fix it?
  • Preheat media/saline to 37°C.
  • Mix rapidly (pipette/vortex) upon addition.
  • For complex mixes, always add the aqueous phase last.
  • Re-dissolve minor precipitates with a 37°C water bath and sonication (≤30 min).

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Note: Technical data last updated: Sep 1, 2026.