DIHYDROPHENAZINECARBOXYLIC ACID DERIVATIVES

摘要

Dihydrophenazinecarboxylic acid derivatives represented by general formula (I) wherein R<1> represents hydrogen, linear or branched alkyl, etc.; R<2> and R<3> each represents hydrogen, 3-methyl-2-butenyl, etc.; and R<4> and R<5> each represents hydrogen, alkyl, alkenyl, alkynyl, aralkyl, aryl, hydroxy, alkoxy, aryloxy, aralkyloxy, halogeno, nitro, cyano, alkylsulfonyl, arylsulfonyl, alkylcarbonyl, arylcarbonyl, etc., exclusive of the case where both of R<4> and R<5> are hydrogen. The dihydrophenazinecarboxylic acid derivatives are excellent in the inhibition of glutamic acid toxicity.