Substituted quinolone derivatives and pharmaceuticals containing the same

摘要

Substituted quinolone derivatives represented by the following formula: <CHEM> wherein R<1> represents a substituted or unsubstituted (hetero)aryl group, R<2> represents H or an alkoxycarbonyl, substituted aminocarbonyl, cyano or like group, and R<3> and R<4> each independently represent H or a substituted alkyl, aryl, amino or like group, and salts thereof; pharmaceuticals containing the same. These derivatives and salts have excellent anti-ulcer activities.