| abstract |
Novel thienopyridine-carboxylic acid derivatives, which are shown by the general formula ##SPC1## n Wherein R 1 represents hydrogen or a lower alkyl; R 2 represents hydrogen, a lower alkyl or a halogen; or R 1 and R 2 , taken together, may represent an alkylene to form a 5- or 6-membered ring with or without alkyl substituents; each of R 4 and R 5 represents hydrogen or a lower alkyl; and their pharmaceutically acceptable salts obtainable when R 4 is hydrogen, which are useful medicines such as chemotherapeutic agents of bacterial infections. |