An antibiotic compound is of formula (I):
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.
                            抗生素化合物为式 (I):
R1-R3、R5 和 R6 独立选自 H、烷基、取代的烷基、卤素、OH、NH2 或 SH;R4 是 H、烷基或取代的烷基。X1-X2 独立选自 O、S、NH、H、烷基、卤素、OH、SH 或 NH2。Y 是具有 4 至 20 个碳原子的
无环烃链或具有 4 至 20 个碳原子的取代
无环烃链,但不包括氧原子。Z 是 
CH3 或任何中性或带正电的基团。化合物也可以是式 (I) 的盐或立体异构体。这些化合物可用于治疗细菌性疾病。