Cytotoxic and Anti-inflammatory Cembranoids from the Soft Coral <i>Lobophytum crassum</i>
作者:Chih-Hua Chao、Zhi-Hong Wen、Yang-Chang Wu、Hsiao-Chien Yeh、Jyh-Horng Sheu
DOI:10.1021/np8004584
日期:2008.12.1
Five new cembranoids, namely, crassumolides A and B and D-F (1 and 2 and 4-6), along with four known metabolites, 7-10, were isolated from the soft coral Lobophytum crassum. Crassumolide C (3) was isolated for the first time from a natural source. The structures of these compounds were elucidated by extensive spectroscopic analysis and comparison of the NMR data with those of known analogues. The absolute
从软质珊瑚豆科植物中分离出五个新的类oid,即景天A,B和DF(1、2和4-6),以及四种已知的代谢产物7-10。首次从天然来源中分离出了Crassumolide C(3)。通过广泛的光谱分析和NMR数据与已知类似物的比较,阐明了这些化合物的结构。使用改良的Mosher方法确定1的绝对立体化学。从7到相应的甲酯3的化学转化揭示了3的绝对立体化学。化合物1、3和7对Ca9-22癌细胞具有细胞毒性,而10对所用的所有六个测试癌细胞系具有广泛的细胞毒性。发现化合物1、3、7和10在10μM时抑制促炎蛋白iNOS和COX-2的积累。