Intermediates for use in preparing novel pyridonecarboxylic acid derivatives or their salts
申请人:WAKUNAGA PHARMACEUTICAL CO., LTD.
公开号:EP0952151A2
公开(公告)日:1999-10-27
An intermediate useful for preparing novel pyridonecarboxylic acid derivatives or their salts, the intermediate represented by the following general formula (C) :
wherein X represents a nitrogen atom, Y represents -CH= or -CR7= (wherein R7 represents a lower alkyl group or a halogen atom), Z represents -CH=, R2a represents a substituted or unsubstituted amino group substituted with a protect group and R3 represents a hydrogen atom or a halogen atom.