A new analogue of Vicenistatin was isolated from the producing strain Streptomyces sp. HC-34. A characteristic of the elucidated structure involved the existence of a neutral sugar mycarose instead of an aminosugar vicenisamine of Vicenistatin. The absolute stereochemistry of the new analogue (named as Vicenistatin M) was determined by the synthesis of D-mycarose and of vicenistatin M itself. Biological testing of Vicenistatin M suggested the importance of vicenisamine for exerting the cytotoxicity of vicenistatin.
从生产菌株链霉菌属(Streptomyces sp.)HC-34中分离出一种新的维西尼司他汀类似物。已阐明结构的一个特征是存在一种中性糖
麦芽糖,而不是维西尼司他汀的
氨基糖维西尼司他胺。通过合成D-
麦芽糖和维西尼司他汀M本身,确定了新类似物(命名为维西尼司他汀M)的绝对立体
化学结构。维西尼司他汀M的
生物学测试表明,维西尼司他胺对于发挥维西尼司他汀的细胞毒性至关重要。