shown to inhibit Sindbis virus, with IC50 values of 0.5, 1.9, and 6.1 μM, respectively. The latter three compounds also had significant synergistic effects against SFV when combined with 3′-amino-3′-deoxyadenosine. In contrast to previous work on other viruses, the antiviral activity of 13 was mapped to take place in virus replication phase. The efficacy was also shown to be independent of external
本文描述了自然存在的三
萜类桦
木精蛋白的合成衍
生物对Semliki森林病毒(SFV)复制的抑制作用(1)。对C-3和C-28上的OH基团以及C-20-C-29双键进行了
化学修饰。还测定了一组杂环白桦蛋白衍
生物。C-3的游离或乙酰化OH基团被确定为抗SFV活性的重要结构贡献者,3,28-di- O-乙酰基白蛋白(4)是最有效的衍
生物(IC 50值为9.1μM )。
桦木酸(13),28- O-
四氢吡喃基贝特林(17)和三唑烷衍
生物(41)还显示可抑制Sindbis病毒,IC 50值分别为0.5、1.9和6.1μM。当与
3'-氨基-3'-脱氧腺苷联合使用时,后三种化合物还对SFV具有显着的协同作用。与以前对其他病毒的研究相比,13的抗病毒活性被映射为在病毒复制阶段发生。还显示功效独立于外部
鸟苷补充。