Novel glycopeptide antibiotic derivatives. These derivatives are represented by the formula (aglycon part of glycopeptide antibiotic derivative)-(Sac-NH)-RA [wherein (aglycon part of glycopeptide antibiotic derivative) is the part formed by removing the sugar part from a known glycopeptide antibiotic derivative; (Sac-NH) part is an amino sugar part or a sugar chain part containing an amino sugar; and RA represents, e.g., the formula -X1-Ar1-X2-Y-X3-Ar2 (wherein X1, X2, and X3 each represents 1) a single bond or 2) a heteroatom or heteroatom-containing group selected from the group consisting of -N=, =N-, -NR1-, -O-, etc.; Y represents -NR2CO- or -CONR2- (wherein R2 represents hydrogen or lower alkyl), etc.)]. These derivatives have antibacterial activity against vancomycin-resistant bacteria.
新型糖肽抗生素衍
生物。这些衍
生物由式(糖肽抗生素衍
生物的苷元部分)-(Sac-NH)-RA 表示[其中,(糖肽抗生素衍
生物的苷元部分)是从已知的糖肽抗生素衍
生物中去除糖部分而形成的部分;(Sac-NH)部分是
氨基糖部分或含有
氨基糖的糖链部分;RA 表示,例如、式-X1-Ar1-X2-Y-X3-Ar2(其中 X1、X2 和 X3 各自代表 1)单键或 2)选自-N=、=N-、-NR1-、-O-等组成的杂原子或含杂原子的基团;Y 代表-NR2CO-或-CONR2-(其中 R2 代表氢或低级烷基)等)]。这些衍
生物对耐
万古霉素细菌具有抗菌活性。