1-(4-Chloro-phenyl)-6,6-dimethyl-1,6-dihydro-[1,3,5]triazine-2,4-diamine hydrochloride

acts on malaria schizonts; inhibitor of dihydrofolate reductase; active against ten P. falciparum field isolates; reduces parasitemia in a mouse model of P. berghei infection

Chemical Formula: C11H15Cl2N5

Molecular Weight: 288.2

OTAVAchemicals Catalogue Number:   0103370265

CAS Registry Number:  152-53-4

Purity: >95%

Ref.: 

1. Br. J. Clin. Pharmacol. 37(5), 413-420 (1994).

2. Proc. Natl. Acad. Sci. USA 87(8), 3014-3017 (1990). 

3. J. Med. Chem. 43(14), 2738-2744.

4. Ann. Trop. Med. Parasitol. 74(4), 393-404 (1980).

5. Proc. Soc. Exp. Biol. Med. 80(2), 367-370 (1952).

Abstract:  Cycloguanil is the active metabolite of the antimalarial prodrug proguanil.1 Cycloguanil is formed from proguanil by the cytochrome P450 (CYP) isoforms CYP2C19 and CYP3A in human liver microsomes. It is an inhibitor of dihydrofolate reductase (DHFR; Kis = 1.5 and 0.79 nM for the P. falciparum and P. berghei enzymes, respectively).2,3 It is active against ten P. falciparum field isolates (IC50s = 0.12-1,400 µg/ml).2 Cycloguanil reduces parasitemia in a mouse model of P. berghei infection (ED50 = 2 mg/kg).4 It also reduces parasitemia in a rhesus monkey model of P. cynomolgi infection when administered at a dose of 0.3 mg/kg.5

DOI: 10.1111/j.1365-2125.1994.tb05707.x

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