| abstract |
A compound of formula (I), or pharmaceutical acceptable salts thereof wherein X is NR1, S(O)g, or O; R1 is H, C1-6 alkyl optionally substituted with one or more OH, CN, or halo, or R1 is -(CH2)h-aryl, -COR1-1, -COOR1-2, -CO-(CH2)h-COR1-1, C1-6 alkyl sulfonyl,-SO2-(CH2)h-aryl, or -(CO)i-Het; R2 is H, C1-6 alkyl, -(CH2)h-aryl, or halo; R3 and R4 are the same or different and are H or halo; R5 is H, C1-12 alkyl optionally substituted with one or more halo, C3-12 cycloalkyl, C1-6 alkoxy. The compounds are useful antimicrobial agents. |