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|Title:||Novel naphthyridine derivatives, intermediates thereof, processes for preparation thereof, and use thereof|
|Abstract:||This invention relates to 1,8-naphthyridine compounds of the formula ##STR1## wherein X is a halogen atom especially fluorine atom, R.sub.1 is an ethyl group or a vinyl group, and R.sub.2 is a hydrogen atom or a lower alkyl group, their salts and processes for the preparation of them. The 1,8-naphthyridine compounds and their salts are useful as antibacterial agents and intermediates thereof.|
|Inventor(s):||Matsumoto; Jun-ichi (Takatsuki, JP), Takase; Yoshiyuki (Amagasaki, JP), Nishimura; Yoshiro (Neyagawa, JP)|
|Assignee:||Dainippon Pharmaceutical Co., Ltd. (Osaka, JP) Laboratoire Roger Bellon (Neuilly sur Seine, FR)|
1. A pharmaceutical composition which comprises an antibacterially effective amount of a 1,8-naphthyridine compound of the formula ##STR31## or a non-toxic pharmaceutically
acceptable salt thereof and a pharmaceutically acceptable carrier therefor.
2. A pharmaceutical composition for oral administration which comprises an antibacterially effective amount of a 1,8-naphthyridine compound of the formula ##STR32## or a non-toxic pharmaceutically acceptable salt thereof and an orally acceptable pharmaceutical carrier therefor.
3. A method for the treatment of a bacterial infectious disease which comprises administering to a warm-blooded animal suffering from such disease an antibacterially effective amount of a 1,8-naphthyridine compound ##STR33## or a non-toxic pharmaceutically acceptable salt thereof.
4. A method according to claim 3 wherein the administration is by oral administration.
5. A method according to claim 4 wherein the disease is a bacterial systemic infectious disease.
6. A method according to claim 4 wherein the disease is a bacterial urinary tract infectious disease.
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