Bioorganic and Medicinal Chemistry 2000-Aug
8-Methylureido-10-amino-10-methyl-imidazo[1,2-a]indeno[1,2-e] pyrazine-4-ones: highly in vivo potent and selective AMPA receptor antagonists.
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Water soluble 8-methylureido-10-amino-10-methyl-imidazo[1,2-a]indeno[1,2-e]pyraz ine-4-one 4 represents a novel class of highly potent and selective AMPA receptors antagonists with in vivo activity. The dextrorotatory isomer (+)-4 was found to display the highest affinity with an IC50 of 10 nM. It also exhibited very good anticonvulsant effects after i.p., s.c. and i.v. administration in mice subjected to electrical convulsions (MES) and i.p. in audiogenic seizure-e in DBA/2 mice (ED50's < or = 10 mg/kg).