摘要 |
The present invention provides a compound of formula I or a pharmaceutically acceptable salt thereof wherein A, X, Y, Z, R<SUP>2</SUP>, R<SUP>3</SUP>, R<SUP>4</SUP>, R<SUP>5</SUP>, and R<SUP>6 </SUP>are as defined herein. The compounds of formula I are useful as antimicrobials against a number of human and veterinary pathogens.
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