| abstract |
An amide derivative represented by the following general formula (I) or a salt thereof and a pharmaceutical composition containing the amide derivative and a pharmaceutically acceptable vehicle. <CHEM> (The symbols in the formula have the following meanings. (wherein A: heteroarylene; X: bond, O, S, -NR<5>-, -NR<5>CO-, -NR<5>CONH-, -NR<5>SO2- or -NR<5>C(=NH)NH-; R<1>: -H, -optionally substituted lower alkyl, -optionally substituted aryl, -optionally substituted heteroaryl or -optionally substituted cycloalkyl; R<2a>, R<2b>: -H or -lower alkyl, which may be the same or different; R<3>: -H or -lower alkyl; R<4a>, R<4b>: -H or -OH, which may be the same different, or R<4a> and R<4b> are taken together to form =O or =N SIMILAR O-lower alkyl; and R<5>: -H or -lower alkyl.) |