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Chiba; Katsumi
Osaka, JP
No. of patents:

Patent Number Title Of Patent Date Issued
6017911 Pyridonecarboxylic acid derivatives and intermediates for the synthesis thereof January 25, 2000
This invention relates to pyridonecarboxylic acid derivatives of the following general formula, esters thereof and salts thereof, as well as pharmaceutical preparations containing them. ##STR1## wherein: R is cycloalkyl which may be substituted by halogen, or the like;X is hydrogen,
5990106 Bicyclic amino group-substituted pyridonecarboxylic acid derivatives, esters thereof and salts t November 23, 1999
This invention relates to bicyclic amino group-substituted pyridonecarboxylic acid derivatives of the general formulaesters thereof and salts thereof, wherein: Pri is a pyridonecarboxylic acid residue, and A is a bicyclic amino group represented by the following formula and joined to the
5817669 Compounds, processes for the preparation thereof and anti-tumor agents October 6, 1998
This invention relates to pyridone-carboxylic acid derivatives of the following formula or salts thereof: ##STR1## wherein R.sub.1 is a hydrogen atom, a halogen atom, etc.,R.sub.2 is a carboxyl group etc.,R.sub.3 is a hydrogen atom etc.,A is a nitrogen atom or CH,m is 1 or 2, andY is an
4738968 1,8-naphthyridine derivatives useful as anti-bacterial agents April 19, 1988
The present invention relates to a 1,8-naphthyridine derivative of the formula ##STR1## wherein X is a fluorine or chlorine atom, and R is a hydrogen atom, or a methyl or ethyl group;and esters thereof and salts thereof are processes for preparation thereof. These compounds show

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