| 摘要 |
The present invention provides compounds of the general formula: …<CHEM>… wherein… R<1> is an aryl, ar(lower)alkyl or pyridyl radical, each of which may be substituted by halogen, amino, lower alkyl, lower alkoxy or carboxy(lower)alkyl,… R<2> is a hydrogen or halogen atom,… R<3> is an amino, lower alkylamino, acylamino or nitro radical,… R<4> is a divalent radical of the general formula -CnH2n- in which n is an integer of from 1 to 7, and… A is oxy, thio, sulfinyl, sulfonyl or imino,… the derivatives of the carboxy group, and the pharmaceutically acceptable salts thereof. …<??>The present invention also provides processes for the preparation of these compounds, as well as pharmaceutical compositions containing them. |
