Catalog Number: 2337
Alternate Names: HL-725
Chemical Name: 2,3,6,7-Tetrahydro-9,10-dimethoxy-3-methyl-2-[(2,4,6-trimethylphenyl)imino]-4H-pyrimido[6,1-a]isoquinolin-4-one hydrochloride
Biological Activity
Extremely potent inhibitor of cGMP-inhibited phosphodiesterase (PDE3; IC50 = 250 pM). Potently inhibits arachidonic acid-induced aggregation of human platelets (IC50 = 50 pM). Orally active antihypertensive agent; reduces systemic blood pressure in both normotensive and hypertensive animal models.
Technical Data
  • M.Wt:
  • Formula:
  • Solubility:
    Soluble to 100 mM in DMSO and to 100 mM in ethanol
  • Purity:
  • Storage:
    Desiccate at RT
  • CAS No:
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.
Background References
  1. HL 725, an extremely potent inhibitor of platelet phosphodiesterase and induced platelet aggregation in vitro.
    Ruppert and Weithmann
    Life Sci., 1982;31:2037
  2. Trequinsin, a potent new antihypertensive vasodilator in the series of 2-(arylimino)-3-alkyl-9,10-dimethoxy-3,4,6,7-tetrahydro-2H-pyrimido[6,1-a]isoquinolin-4-ones.
    Lal et al.
    J.Med.Chem., 1984;27:1470
  3. Role of plasma adenosine in the antiplatelet action of HL 725, a potent inhibitor of cAMP phosphodiesterase: species differences.
    Agarwal et al.
    Thromb.Res., 1987;47:191
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