Previously unknown conjugates of the diterpenoid isosteviol 1 and 1-O-methyl-2,3-di-O-acetyl-β-Darabinofuranoside in which the terpenoid and carbohydrate molecules were linked through polymethylene spacers of various lengths were synthesized. Isosteviol 1 and its conjugate 10 exhibited high bacteriostatic activity selectively against Staphylococcus aureus ATCC 209p. Conjugates 9–11 inhibited growth of Mycobacterium tuberculosis H37Rv at the level of the antituberculosis drug pyrazinamide. Removal of the acetyl protection from conjugate 9 increased the antituberculosis activity by eight times.
                                    先前未知的二萜
异甜菊醇1和1-O-甲基-2,3-二-O-乙酰基-β-阿拉伯
呋喃糖苷的共轭物被合成,其中
萜类和
碳水化合物分子通过不同长度的聚亚甲基间隔基相连。
异甜菊醇1及其共轭物10对
金黄色葡萄球菌A
TCC 209p显示出高度选择性的抑菌活性。共轭物9-11抑制了结核分枝杆菌H37Rv的生长,其
水平与抗结核药物
吡嗪酰胺相当。去除共轭物9的乙酰保护基团使其抗结核活性提高了八倍。