| abstract |
(57) [Summary] (Modified) [Objective] To provide a novel pyridine derivative and a method for producing the same. The present invention relates to pharmaceutically useful compounds of formula I, their non-toxic salts and pharmaceutical compositions containing them. The present invention also includes methods of making the novel compounds and methods of using the compounds in medical treatment. Wherein one of Y 1 and Y 2 is a group represented by -NR- oxygen atom or wherein the wherein R has the meaning according to any one of claims 1 to 3, Y 1 and The other of Y 2 is a methylene group, R 7 is hydrogen, C 1 -C 4 alkyl, C 1 -C 4 alkoxy, halogeno, trifluoromethyl, cyano or nitro, and R 1 , R 2 and R 4 are Hydrogen, alkyl and the like. [Effect] This novel compound is useful for treating conditions such as hypertension and congestive heart failure. |