Degradation experiments are described which establish rigorously structure (II) for neomethymycin (C25H43NO7). This antibiotic belongs, therefore, to the macrolide group and differs from methymycin (I) only in the location of one hydroxyl group, which results in marked changes in chemical behavior. The two antibiotics appear to have the same absolute configuration at the relevant asymmetric centers
描述了降解实验,其严格建立了新甲霉素(C 25 H 43 NO 7)的结构(II )。因此,该抗生素属于大环
内酯类,仅在一个羟基的位置上与甲基霉素(I)不同,这导致
化学行为发生明显变化。两种抗生素在相关的不对称中心处似乎具有相同的绝对构型,如通过常见降解产物的分离和某些旋转分散曲线的总体相似性推断的那样。从
生物遗传学的角度来看,新甲霉素中C-12处的羟基位置值得注意。