R1-R3, R5 and R6 are independently selected from H, alkyl group, substituted alkyl group, halogen, OH, NH2, or SH R4 is H, alkyl group or substituted alkyl group. X1-X2 are independently selected from O, S, NH, H, alkyl, halogen, OH, SH, or NH2 Y is an acyclic hydrocarbon chain having 4 to 20 carbon atoms or a substituted acyclic hydrocarbon chain having 4 to 20 carbon atoms, but does not include an oxygen atom. Z is CH3 or any neutral or positively charged group. The compound can also be a salt or stereoisomer of formula (I). The compounds are useful in treating bacterial diseases.
