Labdane and Kaurane Diterpenoids from <i>Plectranthus </i><i>f</i><i>ruticosus</i>
作者:Cristina Gaspar-Marques、M. Fátima Simões、Aida Duarte、Benjamín Rodríguez
DOI:10.1021/np020493g
日期:2003.4.1
Six new diterpenoids, three labdane and three kaurane derivatives, have been isolated from an acetone extract of Plectranthus fruticosus together with other already known substances. The structures of these compounds (1-5 and 7) were established mainly by spectroscopic means, particularly by 1D and 2D NMR studies, as well as by some chemical correlations with known diterpenoids. The physical and spectroscopic
从苦苣苔(Plectranthus fruticosus)的丙酮提取物中分离出了六个新的二萜类化合物(三个拉丹烷和三个十二烷衍生物)以及其他已知物质。这些化合物(1-5和7)的结构主要是通过光谱学方法确定的,尤其是通过1D和2D NMR研究以及与已知的二萜类化合物的某些化学相关性。通过拉丹烷2的水解获得的衍生物11的物理和光谱数据与先前从克罗顿·乔夫拉(Croton joufra)分离的化合物所报道的数据相同,其他作者错误地将其建立了结构12。测试了几种分离的化合物作为针对三种细菌菌株和一种酵母菌株的抗微生物剂,但只有4种化合物对金黄色葡萄球菌具有中等抑制活性。