| abstract |
A compound of the formula :n wherein R¹ is hydrogen or a protecting group; R² is C₁-C₃ alkyl or C₃-C₇ cycloalkyl; R³ is hydrogen, hydroxy, or amino; R⁴ is halogen; R⁵ and R⁶ are the same or different and are hydrogen or C₁-C₃ alkyl; W is C₁-C₃ alkylidene; X is N or C-Y; Y is hydrogen or halogen; or a pharmaceutically acceptable salt thereof, having a more potent antibacterial activity against G(+) and G(-) bacteria than known analogues, useful as antibacterial agents. |