| abstract |
Antibacterially active new 1,8-bridged 4-quinolone-3-carboxylic acid derivatives of the formula ##STR1## in which Y is carboxyl or a derivative thereof n R 1 , R 2 , R 3 , X 1 , X 2 and X 5 are H or various radicals, n Z is Om NH, substituted NH, ##STR2## m and n are 0 or 1, and A, B, D and E are CH or substituted C or up to three of them are N, n and physiologically acceptable salts thereof. Novel intermediates are described as well as processes for making the intermediates and end products. |