作者:JinXiong Chen、JianChao Chen、Yun Sun、YuXin Yan、LingMei Kong、Yan Li、MingHua Qiu
DOI:10.1055/s-0030-1271197
日期:2011.11
Two new tirucallane triterpenoids, 24,25-epoxy-3 β-hydroxy-20-oxo-7-tirucallene (1) and 22,23;24,25-diepoxy-3 β-hydroxy-7-tirucallene (2), and a new tetranortriterpenoid, 4 α-hydroperoxy-6- O-acetylnimbandiol (3), along with eight known compounds, were isolated from the branches and leaves of Azadirachta indica. Their structures were elucidated through spectroscopic and chemical methods. The cytotoxic
两种新的提洛卡伦三萜类化合物,分别是24,25-环氧-3β-羟基-20-氧代-7-丁烯(1)和22,23; 24,25-二环氧-3β-羟基-7-丁烯(2)和从印A中的树枝和叶子中分离出一种新的四降三萜类化合物,4α-氢过氧-6-O-乙酰基丁二酚(3)以及八种已知化合物。通过光谱和化学方法阐明了它们的结构。细胞毒性试验表明,丰富的成分nimbolide(8)对HL-60,SMMC7721,A549,MCF-7和SW-480细胞系具有明显的细胞毒活性,IC₅₀值为0.8±0.1、2.2±0.2、1.9±分别为1.3、4.5±1.1和2.3±0.1 µM。