Excisanin H, a Novel Cytotoxic 14,20-Epoxy-<i>ent</i>-Kaurene Diterpenoid, and Three New <i>e</i><i>nt</i>-Kaurene Diterpenoids from <i>Rabdosia</i> <i>e</i><i>xcisa</i>
作者:Ming-yu Gui、Yutaka Aoyagi、Yong-Ri Jin、Xu-Wen Li、Tomoyo Hasuda、Koichi Takeya
DOI:10.1021/np030357r
日期:2004.3.1
A novel 14,20-epoxy-ent-kaurene diterpenoid, excisanin H (1), and three new ent-kaurene diterpenoids, 2-4, were isolated from aerial parts of Rabdosia excisa along with eight known ent-kaurene diterpenoids, 5-12. The structural elucidations were made using spectral (HREIMS, IR, (1)H, (13)C, and 2D NMR) methods. The absolute configuration of 1 was determined by demonstrating that oxidation of kamebakaurin
从Rabdosia excisa的地上部分中分离出一种新型的14,20-环氧-ent-月桂烯二萜类化合物exisanin H(1)和三个新的ent-月桂烯二萜类化合物2-4,以及8种已知的ent-月桂烯二萜类化合物5- 12 使用光谱(HREIMS,IR,(1)H,(13)C和2D NMR)方法进行结构阐明。1的绝对构型通过证明kamebakaurin(8)的氧化产生了exisanin H(1)来确定。这些ENT-月桂烯二萜类化合物均对P388鼠白血病细胞显示出显着的细胞毒活性。