CAS No. 1672668-24-4

Batch: Purity:99.79
PT2977 (Belzutifan) Chemical Structure
Chemical Structure
Check the PT2977 (Belzutifan) product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

IUPAC Name 3-[[(1S,2S,3R)-2,3-difluoro-1-hydroxy-7-methylsulfonyl-2,3-dihydro-1H-inden-4-yl]oxy]-5-fluorobenzonitrile
CAS Number 1672668-24-4
Molecular Formula

C17H12F3NO4S

Molecular Weight (MW) 383.34
SMILES CS(=O)(=O)C1=C2C(C(C(C2=C(C=C1)OC3=CC(=CC(=C3)C#N)F)F)F)O
InChIKey LOMMPXLFBTZENJ-ZACQAIPSSA-N

Ordering Information

Biological Activity

Belzutifan (PT2977) is an orally active, selective hypoxia-inducible factor-2α (HIF-2α) inhibitor. By selectively binding to the PAS-B domain of HIF-2α, it blocks heterodimerization with HIF-1β, preventing the assembly of a functional transcriptional complex. Disruption of this complex downregulates downstream target gene expression, including vascular endothelial growth factor (VEGF), which subsequently suppresses tumor cell proliferation, angiogenesis, and survival in clear cell renal cell carcinoma models.

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 77 mg/mL (200.86 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
Water Insoluble
Ethanol 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).

Aliquotting Service

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Pre-aliquoted for Longevity: Solid-state aliquots offer significantly longer shelf life compared to stock solutions, ensuring maximum stability for every use.

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