| 摘要 |
<p>A pyridonecarboxylate derivative represented by general formula (1), wherein R1 represents hydrogen or a carboxyl-protecting group; R2 represents nitro or substituted or unsubstituted amino; R3 represents halogeno; R?4 and R5¿ may be the same or different and each represents hydrogen, halogeno, lower alkyl or lower alkoxy; A represents nitrogen or -CX= (X being hydrogen, halogeno, lower alkyl or lower alkoxy); and Z represents halogeno or a saturated cyclic amino group which may be substituted.</p> |
