Leuconicines A−G and (−)-Eburnamaline, Biologically Active Strychnan and Eburnan Alkaloids from <i>Leuconotis</i>
作者:Chew-Yan Gan、Yun-Yee Low、Tadahiro Etoh、Masahiko Hayashi、Kanki Komiyama、Toh-Seok Kam
DOI:10.1021/np900576b
日期:2009.12.28
Seven new indole alkaloids of the Strychnos type, leuconicines A−G (1−7), and a new eburnan alkaloid, (−)-eburnamaline (8), were isolated from the stem-bark extract of two Malayan Leuconotis species. The structures of these alkaloids were established using NMR and MS analysis and in the case of 8 also by partial synthesis. Alkaloids 1−5 reversed multidrug resistance in vincristine-resistant KB cells
所述的七个新吲哚生物碱马钱子类型,leuconicines A-G(1 - 7),以及一个新eburnan生物碱,( - ) - eburnamaline(8),从两个马来亚干树皮提取物中分离Leuconotis物种。这些生物碱的结构是通过NMR和MS分析确定的,对于8种生物碱,也可以通过部分合成来确定。生物碱1 - 5在耐长春新碱的KB细胞反转多药耐药性。