The present invention relates to new macrolide derivatives, in particular new tylosin derivatives of the formula (Ila), a pharmaceutical or veterinary composition comprising the derivatives; a method for preparation thereof; a method for treating and/or preventing bacterial infections in an animal, wherein the method comprises administering the derivatives or the composition; and a use of the derivatives for the manufacture of medicaments for treating and/or preventing bacterial infections in an animal.
                            本发明涉及新的大环内酯衍
生物,特别是公式(Ila)的新的
泰乐菌素衍
生物,包括这些衍
生物的药用或兽医组合物;其制备方法;用于治疗和/或预防动物细菌感染的方法,所述方法包括给动物投予这些衍
生物或组合物;以及这些衍
生物用于制造治疗和/或预防动物细菌感染药物的用途。