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A Mini Review on Biological Activities of 6-(4-Chlorophenyoxy)-Tetrazolo [5,1-A] Phthalazine (Quan-0808) Compound


  • Department of Pharmacy, GRD(PG) IMT, Dehradun - 248009, (Uttarakhand), India


Purpose: QUAN-0808 (6-(4-chlorophenoxy)-tetrazolo[5,1-a]phthalazine) was tested for the anticonvulsant, anti-inflammatory, analgesic, anticoagulant, antithrombotic and antidepressant effects.

Approaches: Anticonvulsant activity was testedby electroshock seizure model and neurotoxicity was tested by the rotarod neurotoxicity test in mice. In chemically induced models of seizure like pentylenetetrazole, isoniazid, thiosemicarbazide and 3-mercaptopropionic acid were further tested for the anticonvulsant activity.

Findings: QUAN-0808 caused significant anticonvulsant activity against all types of seizures. It appreciably reduced xylene-induced ear edema, reduced the prostaglandin E2 and nitric oxide levels on the edema and reduced acetic acid-induced capillary permeability hyperactivity and reduced acetic acid-induced writhing response. It exhibited anti-inflammatory and antinociceptiveeffect in a dose-dependent manner.

Conclusions: The peripheral effect mechanisms of QUAN-0808 may be related to a reduced in the formation of PGE2, NO, bradykinin and additional inflammatory mediators. The anticoagulant and antithrombotic effects of Q808 delayed bleeding and clotting time in mice. QUAN-0808 exerts anticoagulant, antithrombotic and antidepressant effect, exhibited a significant reduction in immobility as antidepressant.


Tetrazolo-Phthalazine, Anticonvulsant, Antidepressive, QUAN-0808, Anti-Inflammatory, Antinociceptive, Antithrombotic.

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