Catalog Number: 4165
Alternate Names: UK 369003
Chemical Name: 5-[2-Ethoxy-5-[(4-ethyl-1-piperazinyl)sulfonyl]-3-pyridinyl]-3-ethyl-2,6-dihydro-2-(2-methoxyethyl)-7H-pyrazolo[4,3-d]pyrimidin-7-one benzenesulfonate
Biological Activity
Potent PDE5 inhibitor (IC50 = 1.23 nM). Shows >100-fold selectivity for PDE5 over PDE6. Orally bioavailable.
Technical Data
  • M.Wt:
    677.79
  • Formula:
    C23H33N7O5S.C6H6O3S
  • Solubility:
    Soluble to 10 mM in water and to 100 mM in DMSO
  • Purity:
    >99%
  • Storage:
    Desiccate at RT
  • CAS No:
    334827-98-4
The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis. All Tocris products are intended for laboratory research use only.
Additional Information
Licensing Caveats:
Sold for research purposes under agreement from Pfizer Inc.
Background References
  1. Emerging drugs for the treatment of benign prostatic obstruction.
    Hashim and Abrams
    Exp.Opin.Invest.Drugs, 2010;15:159
  2. The discovery of UK-369003, a novel PDE5 inhibitor with the potential for oral bioavailability and dose-proportional pharmacokinetics.
    Rawson et al.
    Bioorg.Med.Chem., 2012;20:498

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