In this paper, a series of 6-substituted-pyrido[3,2-e][1,2,4]triazolo[4,3-a]pyrazine derivatives have been synthesized. Their anticonvulsant activity and neurotoxicity in mice were evaluated by maximal electroshock(MES) and rotarod test,respectively. The structures were confirmed by ~1 H NMR, ~(13)C NMR, MS and HRMS. The experimental results show that6-phenoxypyrido[3,2-e][1,2,4]triazolo[4,3-a]pyrazine(5 g) was safer than the reference drug,carbamazepine,with ED_(50) value of 93.9 mg·kg~(-1) and protective ...